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GLOSSARY

Agriculture data

Statistics on crops and livestock are produced from the annual ABS Agricultural Survey. The scope of the survey is establishments undertaking agricultural activity with an estimated value of agricultural operations of $5,000 or more.

Fruit and Vegetables - The split between Litchfield, Alligator, Finniss and Daly SSDs are based on tree count or area under cultivation rather than actual value. (Table 11.2).

Australian Taxation Office (Table 6.2)

Postcode to Statistical Local Area (SLA) concordances have been used to convert the Australian Taxation Office (ATO) postcode data to estimates for SLAs. The concordances are based on the estimated resident population and calculated on SLA boundaries as defined in the Detailed Main Structure of the Australian Standard Geographical Classification (ASGC) (cat. no. 1216.0). Data should be considered as estimates or indicators only. Care needs to be taken when using the data.

The statistics for each income year were sourced from individual income tax returns and associated business and professional items schedules processed by 31 October of the following year. The statistics are not necessarily complete. For further information please refer to the 'Source of personal tax statistics' section in the 'Personal tax' chapter of the Australian Taxation Office {{\*ppwcharstyle Legislation} Taxation Statistics} publications. (Table 6.3).

Wage and salary earners - Persons aged 15 years and over who have submitted a tax return and for whom wage and salary income was the principal source of income for the financial year.

Wage and salary income - Includes all group certificate income and allowances, benefits, earnings and tips including car, travel and other allowances, gratuities, consultation fees, honoraria and commissions, and other payments for service.

Total income - The sum of income from all sources as reported on the individual income tax return for the financial year.

Net tax ratio - The net tax ratio (or effective rate of tax) is calculated by dividing net tax by taxable income.

Taxation statistics - Further information about the scope, coverage and definitions of the data items presented in the tables can be found in the ABS publication: 'Information Paper, Use of Individual Income tax Data for Regional Statistics, Experimental Estimates for Small Areas, 1995-96 and 1996-97, Cat. no 5763.0, released 26th November 2001.

Average annual growth rate

The average annual rate of population growth, r, is calculated as a percentage using the formula below, where P_o is the population at the start of the period, P_n is the population at the end of the period and n is the length of the period between P_n and P_o in years.

Births

Age-specific fertility rates - Age-specific fertility rates are the number of live births during the calendar year, according to the age of the mother, per 1,000 of the female estimated resident population of the same age at 30 June. For calculating these rates, births to mothers under 15 years are included in the 15-19 years age group and births to mothers aged 50 years and over are included in the 45-49 years age group. Pro rata adjustment is made for births for which the age of the mother is not given.

Birth - Births are allocated to a Statistical Local Area according to the usual residence of the mother, irrespective of the state or territory in which the birth was registered.

Indigenous birth - An Indigenous birth is the birth of a live-born child where either the mother or the father was identified as being of Aboriginal or Torres Strait Islander origin on the birth registration form. There is an undercoverage of Indigenous births in most states and territories. Therefore, measures of Indigenous fertility and mortality are likely to be conservative estimates. Given the volatility in measures of Indigenous fertility and mortality, caution should be exercised when assessing trends over time. (Table 3.8).

Life expectancy at birth

Life expectancy at birth refers to the average number of years a person of a given sex and Indigenous status born in the specified year might expect to live if the age-specific death rates of the given period continued through his or her lifetime.

Total fertility rate - The total fertility rate is the sum of age-specific fertility rates and represents the number of children a female would bear during her lifetime if she experienced current age-specific fertility rates at each age of her reproductive life.

Building data

Building approvals - Statistics of building work approved are compiled from:

• permits issued by licensed Private Building Certifiers or the Building Branch, Northern Territory Department of Planning and Infrastructure, in areas subject to building control by those authorities;
• contracts let or day labour work authorised by Commonwealth, state, semi-government and local government authorities; or
• major building approvals in areas not subject to the normal administrative approval processes (e.g. building on remote mine sites).

Census of Population and Housing 2001

A Census of Population and Housing was conducted by ABS on 7 August 2001. The objective of each Census is to measure accurately the number and key characteristics of people in Australia on Census night, and the dwellings in which they live. Data based on where people were on Census night are referred to as place of enumeration counts.

Place of usual residence counts are derived from place of enumeration counts after adjustments for temporary visitors are made based on the census question about the "...address at which the person has lived or intends to live for a total of six months or more in (2001)". Adjustments have also been made for residents temporarily absent (but counted elsewhere in Australia) but not for incomplete or imperfect counting.

Census data cells with counts of three or less are randomly adjusted to avoid releasing information about particular individuals, families or households. The effect of random adjustment is usually statistically insignificant.

Centrelink

Postcode to Statistical Local Area (SLA) concordances have been used to convert the Centrelink postcode data to estimates for SLAs. The concordances are based on the estimated resident population and calculated on SLA boundaries as defined in the Detailed Main Structure of the Australian Standard Geographical Classification (ASGC) (cat. no. 1216.0). Data should be considered as estimates or indicators only. Care needs to be taken when using the data.

Centrelink benefits are listed below: (Table 6.4).

Age Pension - A payment for people who have reached retirement age. To qualify for the Age Pension a male must be aged 65 years, while the age at which a female may qualify depends upon her birth date. There are also other eligibility requirements with regard to assets, income and residency which must be met. This payment is the responsibility of the Australian Government Department of Family and Community Services.

Disability Support Pension - A payment for people whose physical, intellectual or psychiatric impairment prevents them from working, or for people who are permanently blind. For the years shown, this payment was the responsibility of the Australian Government Department of Family and Community Services.

Family Tax Benefit - A payment that provides help to families with the costs of raising children and gives extra assistance to sole parent families and to families with one main income where one parent chooses to stay at home to balance some paid work with caring for their children. This payment is the responsibility of the Australian Government Department of Family and Community Services.

Newstart Allowance - A payment for working-aged persons who are unemployed, aimed at ensuring recipients participate in activities designed to help their employment prospects. For the years shown, this payment was the responsibility of the Australian Government Department of Family and Community Services.

Parenting Payment (single) - A payment available to a single parent/guardian who earns little or no income and is responsible for caring for children. For the years shown, this payment was the responsibility of the Australian Government Department of Family and Community Services.

Rent Assistance - A payment, which is a non-taxable income supplement, paid to individuals and families who rent in the private rental market. Pensioners, allowees and those receiving more than the base rate of family tax benefit part A may be eligible for rent assistance. This payment is the responsibility of the Australian Government Department of Family and Community Services.

Youth Allowance - A payment that provides income support to young people who are either looking for work, studying or who are sick. For the years shown, this payment was the responsibility of the Australian Government Department of Family and Community Services.

Climate

Wet season rainfall - Average is based on the period since records have been collected (Darwin 1941; Nhulunbuy 1944; Katherine 1943; Tennant Creek 1969 and Alice Springs 1942) up to and including 2004-2005. (Table 2.3).

Concordance

Note: Preparation of the postcode to SLA concordance is an inexact science, and an ongoing process. Updates to these concordances (current and historical) are made periodically, depending on feedback and resources available to update.

Footnotes: This population-weighted concordance may be used to translate statistics aggregated by postcode to Statistical Subdivision (SSD) aggregations. Resulting statistics will be less accurate if the variable being converted is not distributed across the postcode in the same way that the population is distributed. While this concordance is provided to two decimal places, accuracy to this level is not claimed and should not be assumed. Non- mappable postcodes, such as Post Office Boxes, are generally excluded from this concordance because of their non-spatial nature. Postcodes not part of the current Australia Post post-code-locality listing may be included in this concordance. For the current Australia Post postcode-locality listing see the Australia Post web site www.auspost.com.au.

Disclaimer: The concordance product is based on the postcode to SLA concordance created by the Small Area Population Unit, Australia Bureau of Statistics, for the purposes of converting population indicator data. While care was taken in producing this concordance, it is not an official ABS product, and the ABS will not guarantee the accuracy of the concordance. No liability will be accepted by the ABS for any damages arising from decisions or actions based upon this concordance. (Tables 1.1, 5.3, 6.2 and 6.4).

Deaths

Death - Deaths are allocated to a Statistical Local Area according to the usual residence of the deceased, irrespective of the state or territory in which the death was registered.

Indigenous death - An Indigenous death is the death of a person who is identified as being of Aboriginal and Torres Strait Islander origin on the death registration form. There is an undercoverage of Indigenous deaths in most states and territories. Therefore, measures of Indigenous fertility and mortality are likely to be conservative estimates. Given the volatility in measures of Indigenous fertility and mortality, caution should be exercised in assessing trends over time. (Table 3.8).

Infant death - An infant death is the death of a live-born child who dies before completing his or her first birthday. Foetal deaths (stillbirths) are recorded separately. Infant deaths are allocated to a Statistical Local Area according to the usual residence of the mother, irrespective of the state or territory in which the death was registered.

Standardised death rates - Standardised death rates allow the comparison of death rates between populations with different age structures by relating them to a standard population. The current standard population is all persons in the 2001 Australian population. The standardised death rate is the overall death rate that would have prevailed in the 2001 Australian population if it had experienced at each age the deaths rates of the population under study.

Underlying causes of death - Classified according to the tenth revision of the World Health Organisation's International Classification of Diseases (ICD).

Department of Veterans' Affairs

Department of Veterans' Affairs pensions listed below: (Table 6.5).

Disability Pension - A compensation payment for injuries or diseases caught or aggravated by war service or certain defence services performed on behalf of Australia. The amount paid is dependent on the level of incapacity suffered as a result of the war-caused or defence-caused injuries and diseases.

Veteran Service Pension - A means-tested payment that can be paid to veterans on the grounds of age or invalidity. It is payable to males aged 60 years or over while the age at which a female may quality depends upon her date of birth. Eligibility is also subject to Australian residency requirements.

Partner Service Pension - A payment to eligible partners, widows or widowers of veterans who are receiving or are eligible to receive the Service Pension. It is payable to males aged 65 years and over while the age at which a female may quality depends upon her date of birth.

War Widow(er) Pension - A pension that is paid to compensate widowed partners of veterans who have died as a result of war service or eligible defence service. War widow(er) pensions are not affected by other income except from other compensation payments.

Education

Teaching staff - Teaching staff includes all classroom and executive teachers (e.g. principals, full-time and part-time teachers, exchange and visiting teachers, resource teachers, teacher librarians, assistant teachers, part-time instructors, student counsellors, teachers employed through the Community Development Employment Projects (CDEP) Program and other 'Commonwealth employed' staff that are not under the jurisdiction of the Chief Executive Officer of the NT Department of Employment, Education and Training).

Total number of teaching staff - The actual number of teaching staff, including full-time and part-time staff.

FTE of teaching staff - FTE is the full-time equivalent of teaching staff numbers, calculated by adding the FTE of full-time staff and the FTE of part-time staff (part-time FTE is calculated as a proportion of full-time FTE), (Table 5.1(a)).

Student enrolment - The total number of students officially enrolled on the collection date and who have attended school within a four week period preceding the collection date. Students are allocated to a region based on the postcode of the location the student nominates as his or her permanent home residence.

FTE of student enrolment - FTE is the full-time equivalent of student enrolment numbers. It is calculated by adding the FTE of full-time students and the FTE of part-time students (part-time FTE is calculated as a proportion of full-time FTE).

Student enrolment by level - 'Year' is not necessarily the number of years the student has been at school but is a measure of their level of education.

Primary Special - Students who have been panelled through Student Services as having special needs, sensory impaired students, high support needs students and students attending special purpose schools.

Ungraded Secondary - Students who are aged 12 years or over and undertaking a Special Category Curriculum and includes students in Secondary Support Units (i.e. Aboriginal/Indigenous Units, Secondary Indigenous Education Units).

Secondary Special - Students who have been panelled through Student Services as having special needs, sensory impaired students, high support needs students and students attending special purpose schools.

Estimated resident population

The estimated resident population (ERP) is the official ABS estimate of the Australian population which is based on the concept of usual residence. The ERP for 30 June 2001 is based on the results of the 2001 Census of Population and Housing held on 7 August 2001. It is calculated by adjusting Census counts by place of usual residence by:

• adding the estimated net Census undercount and Australian residents estimated to have been temporarily overseas at the time of the Census;
• subtracting overseas visitors in Australia at the time of the Census; and
• adjusting for births and deaths and interstate and overseas migration during the period 1 July to 7 August 2001.

Experimental estimated resident Indigenous population

ABS produces experimental estimates of the Indigenous population. The estimates are considered experimental in that the standard approach to population estimation is not possible because satisfactory data on births, deaths and internal migration are not generally available and because of the intercensal volatility in Census counts of the Indigenous population. This volatility can in part be attributed to changes in the propensity of persons to identify as being of Indigenous origin. The latest experimental estimates at 30 June 2001 are based on 2001 Census of Population and Housing usual residence counts and make allowances for instances in which Indigenous status is unknown and for net under-enumeration. An adjustment is also made from 7 August 2001 back to 30 June 2001 for natural increase (births less deaths).

Users should be aware that Census characteristics data cannot be reconciled with experimental estimates of the resident Indigenous population because they represent Census counts which are not adjusted for under-enumeration or the other factors discussed above. (The 2001 Census count of Indigenous people in the NT was 50,785 and the experimental Indigenous ERP at 30 June 2001 was 56,875.) Users should therefore be careful when using these two data sources together. Experimental estimated resident Indigenous data are presented in Table 9 (page 21) of Australian Bureau of Statistics, Cat. no 3101.0, June 2005.

Experimental projected Indigenous population

The base population for these projections is the 30 June 2001 Census Collection District experimental Aboriginal and Torres Strait Islander population estimates, which are amalgamated into Indigenous Regions based on the boundaries of the former Aboriginal and Torres Strait Islander Commission (ATSIC) Regions at 30 June 2004. These projections are for the period 2002 to 2009 and use the Northern Territory level of fertility, mortality, internal and overseas migration and unexplained growth assumptions described in Experimental Estimates and Projections, Aboriginal and Torres Strait Islander Australian, 1991 to 2009 (cat. no. 3238.0). Indigenous Regions are ascribed the rates assumed for the Northern Territory. (Table 3.6), (Table 3.7).

The projections for both High series and Low series assume: (Tables 3.6 and Table 3.7).

• female fertility rates (birth rates of Indigenous mothers) decline annually by 1%;
• no change in mortality during the projection period. This means that the estimate of Indigenous life expectancy at birth is projected to be constant at the 1996-2001 level;
• constant numbers of net interstate movements as measured in the period 1996-2001 in the 2001 Census;
• zero net overseas migration with no departures throughout the projection period; and
• unexplained growth in the Indigenous population (i.e. the increase in the Indigenous population observed between the 1996 and 2001 censuses which cannot be attributed to natural increase) either continues at the rate observed in the 1996-2001 period (high series) or does not occur (low series). Under the high series, the Northern Territory's share of the total Indigenous population would decline from 12.4% in 2001 to 10.8% in 2009. Under the low series, the Northern Territory's share would decline from 12.4% in 2001 to 12.1% in 2009.

Hospital separations

Separation - Separation is the term used to refer to the episode of care, which can be a total hospital stay (from admission to discharge, transfer or death) or a portion of a hospital stay beginning or ending in a change of type of care (e.g. from acute to rehabilitation). 'Separation' also means the process by which an admitted patient completes an episode of care by being discharged, dying, transferring to another hospital or changing type of care. (Table 8.1).

Weighted separation - An average measure of resource consumption using admitted patient episodes in hospital.

Labour force data

DEWR small area labour force estimates - The Department of Employment and Workplace Relations (DEWR) has implemented a procedure for deriving small area labour market estimates, based on the Structure Preserving Estimation (SPREE) methodology. The purpose of SPREE is to produce estimates that reflect the regional disparities of Centrelink data, while being consistent with ABS Labour Force Survey estimates. There are two assumptions made in applying the SPREE methodology. First, it is assumed that recipients of unemployment benefits are uniformly distributed within postcodes. Second, it is assumed that there have been no changes to postcode and SLA boundaries since the 2001 Census of Population and Housing. The reliability of these estimates compared with the Census estimates has been found to vary with the size of the population in small area regions, and these estimates should be treated with caution. (Table 1.1 and Table 1.2).

Labour force status - Labour force status identifies whether a person aged 15 years or over is employed, unemployed or not in the labour force.

Employed - Includes those people who, during the reference period, worked for payment or profit, who had a job from which they were on leave or were otherwise temporarily absent, who were on strike or stood down temporarily or who worked as unpaid helpers in a family business. CDEP participants are classified as employed in the labour force.

Unemployed - Includes people who did not have a job but were actively looking for work (either full-time or part-time) and were available to start work.

Not in the labour force - Includes people aged 15 years or more who were not employed or unemployed as defined above. This category includes people who were retired, pensioners and people engaged in home duties.

Labour force participation rate - The labour force participation rate is the number of persons in the labour force expressed as a percentage of the population aged 15 years and over. The participation rate is calculated excluding persons who did not state their labour force status.

Unemployment rate - The unemployment rate is the number of unemployed people expressed as a percentage of the labour force.

Law and Justice

Apprehension - Apprehension incorporates all recorded law enforcement action against a person for suspected unlawful acts. It includes enforcement action by way of arrest and summons. The statistics are generated by counting the number of apprehension reports. Many factors can influence crime statistics such as changes in the age composition of the population, legislation, police enforcement practices and reporting by the public to police. (Table 7.3).

Juvenile apprehension - Juvenile apprehensions refer to all recorded law enforcement action against a juvenile for suspected unlawful acts. Since 1 June 2000 'juvenile' has been defined in the NT as a person aged 10-17 years. Prior to 1 June 2000 'juvenile' was defined as a person aged 10-16 years.

Criminal cases lodged and finalised - Lodgements are counted at the case level when a case has more than one offence associated with it. The defendant is only counted against the most serious offence which may include offences such as breach of justice order (e.g. breach of bail, parole or domestic violence order), subverting the course of justice, possessing or supplying contraband within prisons and failure to lodge tax. (Table 7.7).

Offence - An offence is an act considered prima facie to be in breach of the criminal law. Offence data has been classified according to the Australian Standard Offence Classification (Cat. no. 1234.0), (Table 7.1) and (Table 7.2).

Defendants adjudicated, Supreme Court - Defendant cases judged or decided upon by the Supreme Court as to whether or not the defendant is guilty of the charge(s) laid against them.

Traffic offences and traffic infringement notices - These figures are not a unique count of traffic offences as one infringement may contain more than one offence. Traffic offence data cannot be reconciled with traffic infringement notice data because this information is recorded on two different systems. Traffic infringement notice data also includes speed camera offences which are not recorded in the traffic offence data, (Table 7.5).

People Smugglers - are foreign nationals convicted under federal legislation of the transportation of illegal migrants to Australia. The influx of people smugglers started in August 1999 when they represented 4% (or 22 prisoners) of the prison population. By September 2001 they represented 21% (or 144 prisoners) of the NT prison population. Since 2001 the number of people smugglers has declined to 2% (or 14 prisoners) of the prison population in June 2003. People Smugglers are counted as non-Indigenous prisoners. (Table 7.9).

Protective Custodies - Many factors can influence crime statistics such as changes in the age composition of the population, legislation, police enforcement practices and reporting by the public to the police. Caution should be taken when interpreting these statistics. (Table 7.4).

Maps

Northern Territory Government Administrative Regions and Selected Sub Regions (a) - In previous editions of this publication Northern Territory Government Administrative Regions and Selected Sub regions were used as standard geography. In this edition only Table 9.1 is published using this geography.

Mean

The mean,or average, is calculated by summing the values of all observations in a data set and then dividing the number of observations in the set.

Median

A median is a measure of central tendency. It is a mid-value which divides a population distribution into two, with half the observations falling below it and half above. Unlike averages (means), medians are not usually skewed by extreme observations.

Minerals

Other nonmetallic minerals include barite, crushed rock, gravel, limestone, quicklime, vermiculite, soil, sand, dimension stone/sandstone and salt.

Northern Territory Economy

Community Government Council (CGC) - A local government authority constituted under the NT Local Government Act to provide local government services. CGCs have gazetted boundaries and are legally constituted as Local Government Areas.

Incorporated Association (IA) - A body constituted under the NT Incorporations Act with roles and responsibilities similar to local government municipal councils. IAs are funded by both the NT and Australian governments to provide local government services in geographic areas not included in any other Local Government Area. IAs do not have clearly defined boundaries.

Local Government Finance - Local Government Finance data is sourced from state/ territory Local Government Grants Commissions, or equivalent. The ABS quality assures this data primarily at the state/territory level. Clients should be advised that unit record data remains largely as reported by councils to the relevant Grants Commission. This approach can result in the sum of the data released at the unit level differing from published state and territory totals. (Table 14-3).

Baraunga Manyallaluk, Gulin Gulin & Weemol and Wugularr merged in 2004 to form Nyirranggulung Mardrulk Ngadberre Regional Council. (Table 14-3).

Notifiable diseases

The list of Notifiable diseases changes from year to year. As ABS are publishing a time-series this year, data for some diseases is not available for each year in the series, but this does not mean there were no incidences of that disease in that year, just that it was not notifiable. Caution should be taken in interpreting the data.

Bloodborne diseases - includes Hepatitis B, Hepatitis C, Hepatitis D, Hepatitis E and Human T-Lumphotropic virus type1 (HTLV1).

Gastrointestinal diseases - Campylobacteriosis, Cryptosporidiosis, Gastroenteritis (involving one or more related cases by an institution or food handler), Haemolytic Uraemic Syndrome, Hepatitis A, Listeriosis, Rotavirus Infection, Salmonellosis (including paratyphoid), Shigellosis, Food/water borne disease, Typhoid, Yersiniosis and Amoebiasis.

Sexually Transmissible - Chlamydial Infection, Donovanosis (granuloma inguinale), Gonococcal Conjunctivitis, Gonococcal Infection, Gonococcal Neonatal Ophthalmia, Human Immunodeficiency Virus (HIV) (In 2002, HIV was classified as a Bloodborne disease), Syphilis, Syphilis - Congenital, Trichomoniasis, Lumphogranuloma venereum, Chancroid.

Vaccine preventable diseases - Diptheria, Haemophilus Infection Type b (invasive), Measles, Pertussis, Pneumococcal Disease (invasive), Rubella, Meningococcal Infection, Poliomyelitis, Congenital Rubella Syndrome.

Vectorborne diseases - Arbovirus Infection (not otherwise specified), Barmah Forest Virus Infection, Dengue Virus Infection, Malaria, Murray Valley Encephalitis, Ross River Virus Infection, Typhus, Kunjin Virus.

Zoonosis - Leptospirosis, Q Fever, Brucellosis, HYdatid disease, Ornithosis (Psittacosis).

Other notifiable diseases - Acute post-Streptococcal Glomerulonephritis, Rheumatic Fever, Adverse Vaccine Reaction, Non-tuberculous Mycobacterial Disease, Chlamydial Conjunctivitis, Haemophilus Influenzae (not Type b), Influenza, Legionellosis, Melioidosis, Meningococcal Infection, Tuberculosis, Leprosy, including quarantineable diseases (Cholera, Viral Haemorrhagic fever), Severe Actu Respiratory Syndrome (SARS).

Off-Shore Areas & Migratory

Includes people who are enumerated on offshore oil rigs, drilling platforms and the like, aboard ship in Australian waters, or on an overnight journey by train or bus.

Population

Household composition - Includes those households that contained only persons aged under 15 years, households which were temporarily unoccupied at the time of the Census but were normally occupied and households which could not be classified elsewhere due to insufficient information being provided on the Census form. (Table 3.12).

Population projections - Population projections are not intended as predictions or forecasts but are illustrations of growth and change in the population which would occur if certain specified assumptions about future demographic trends prevailed over the projection period. The projections are based on a combination of assumptions for future levels of births, deaths and migration.

Population projections for Australia, the states and territories and capital cities/balances of state are published every two to three years. The latest projections are based on the results of the 2001 Census of Population and Housing and relate to the period 2004 to 2101. For further information about these projections and the assumptions used refer to Population Projections, Australia, 2004 to 2101 (cat. no. 3222.0).

The latest projections for SLAs and regions in the NT are based on the results of the 1996 Census of Population and Housing and relate to the period 1999 to 2021. The following assumptions were used to generate these projection results.(Table 3.5).

Series A (high) assumes: the total fertility rate declines from 2.20 births per female in 1998 to 2.16 in 2007 and then remains constant to 2021; a net overseas migration gain of 938 people in 1999-2000, 844 in 2000- 01 then an annual net gain of 721 from 2001-02 to 2021; and net interstate migration increases from -600 in 1999-2000 to 1,500 in 2003-04 and then remains constant to 2021.

Series B (medium) assumes: the total fertility rate declines from 2.20 births per female in 1998 to 1.97 in 2008 and then remains constant to 2021; a net overseas migration gain of 938 people in 1999-2000, 756 in 2000-01 then an annual net gain of 574 from 2001-02 to 2021; and net interstate migration increases from -600 in 1999-2000 to nil in 2002-03 and then remains constant to 2021.

Series C (low) assumes: the total fertility rate declines from 2.20 births per female in 1998 to 1.97 in 2008 and then remains constant to 2021; a net overseas migration gain of 938 people in 1999-2000, 687 in 2000-01 then an annual net gain of 429 from 2001-02 to 2021; and net interstate migration decreases from -600 in 1999-2000 to -1,500 in 2003-04 and then remains constant to 2021.

All series used the same assumption for mortality which is that life expectancy at birth increases from the 1996-1998 level of 70.5 years for males and 75.4 years for females to 74.7 years for males and 78.5 years for females in 2021.

For further information regarding these population projections refer to Population Projections, Northern Territory, 1999 to 2021(cat. no. 3222.7).

These projections were calculated using revised estimated resident population data at 30 June 1999 as the base population. The Projections are based on assumptions agreed to by the Northern Territory Statistical Liaison Committee. All SLAs in these projections are based on the boundaries which existed at the 2001 Census (ASGC 2001). The actual boundaries for a given SLA, or for other geographic regions such as Local Government Areas (LGAs) derived from this SLA, may change over time making the projections no longer comparable with other data.

Remoteness

The Australian Standard Geographical Classification (ASGC) Remoteness Structure is based on the Accessibility/Remoteness Index of Australia (ARIA) which measures the remoteness of a point based on the physical road distance to the nearest Urban Centre. For more information on the Remoteness Structure, see Statistical Geography Volume 1, Australian Standard Geographical Classification (ASGC), 2001 (cat. no. 1216.0).

Non-Remote - Geographical areas within the 'Major Cities of Australia', 'Inner Regional Australia' and 'Outer Regional Australia' categories of the Australian Standard Geographical Classification (ASGC) Remoteness Structure. For the NT, non-remote comprises Darwin City SSD, Palmerston-East Arm SSD and Litchfield Shire SSD.

Remote - Geographical areas within the 'Remote' and 'Very Remote' categories of the Australian Standard Geographical Classification (ASGC) Remoteness Structure. For the NT, remote covers the whole of the NT excluding Darwin City SSD, Palmerston-East Arm SSD and Litchfield Shire SSD.

Road length

Data refers to Northern Territory Department of Planning and Infrastructure managed roads only. Data includes the internal parks roads that are maintained by the department but have not been reported on in previous years, approx 1270km. The internal parks roads were reported on for the "2005 Road length data for ABS Yearbook (NT)". Local government managed roads are not included. (Table 9.1).


Road traffic accident

A road traffic accident is an unpremeditated event which results in property damage or the death of/injury to a person and is attributable to the movement of a vehicle on a public road (including vehicles entering or leaving a public road). (Table 9.3).

Fatality - Where a person is killed outright or dies within 30 days of being involved in a motor vehicle accident, and their death was directly attributed to injuries sustained in the accident.

Injury - Where a person sustained some degree of injury as a direct result of a motor vehicle accident. The three levels of injury in the Northern Territory are:

treated and admitted to hospital;
treated but not admitted to hospital; and
injured but did not seek treatment.

Road works expenditure

Maintenance work - Includes repair work done to a road to take it back to its original servicing level, before wear and tear, regardless of the cost of such work. For example, maintenance work includes resurfacing roads, replacing paving, etc.

Minor works and capital works - Includes any work that goes towards improving or increasing the service offered by a road. An example of this is upgrading from a gravel to a sealed road, or increasing the width of a road or the number of lanes, etc. Works are considered capital works when the value of this work is $100,000 or over and minor works when the value is under $100,000.

Rates per 1,000 or 10,000 population

Rates are calculated using the Estimated Resident Population figure corresponding to the relevant year.

Rounding

Where figures have been rounded, discrepancies may occur between sums of the component items and the totals shown.

Sentence type

Fixed term - Sentences where there is no minimum term or non-parole period set. The prisoner is required to serve the whole sentence, less any remission allowed, in custody and when released from custody is not subject to any further correctional intervention.

Maximum-minimum - Sentences where a person may be eligible to be released on parole after serving a minimum term in custody, and who must be released once a maximum term has been served.

Indeterminate - Persons sentenced to life imprisonment, persons declared as habitual criminals, persons who are either permanently or temporarily deemed not responsible for their actions because of a mental disorder or intellectual disability and prisoners who are sentenced to imprisonment but have not had a release date set.

Total hourly rates of pay index

The total hourly rates of pay index measures quarterly change in combined ordinary time and overtime hourly rates of pay. The total hourly rates of pay indexes that exclude bonuses are based on a weighted combination of ordinary time hourly wage and salary rates and overtime hourly rates. As a result, the total hourly indexes reflect changes in both the ordinary time and overtime hourly rates. However, the effect of changes in the amount of overtime paid at each overtime rate is not shown in these indexes.

Tourism

Tourism NT information is now published as 'Tourism Areas' instead of regions, as previously published. The areas are as defined (Table 13.2 and 13.5):

The Top End Area includes the Darwin, Kakadu and Arnhem tourism regions.
The Katherine Area includes the Katherine and Daly tourism regions.
The Barkly Area includes the Tablelands tourism region only.
The Centre Area includes the Alice Springs, Petermann and MacDonnell tourism regions.

Tourist Accommodation Survey - The ABS Region definition is as follows: The Darwin Tourism Region equates to Darwin SD and Environs, Katherine Tourism Region equates to Katherine Region, Alice Springs Tourism Region equates to the township of Alice Springs only, Other includes balance of Central Region (Statistical Local Areas of Petermann, Sandover-Bal and Tanami), Darwin Region Balance, East Arnhem Region and Barkly Region. (Table 13.6, 13.7 and 13.8).

Visitor - The Northern Territory Tourist Commission defines a visitor as someone who has travelled at least 40 kilometres from their usual place of residence and who will spend at least one night away from home. Also, to be included the trip must be short-term. A short-term trip is defined as at least one night but less than 90 nights spent in the NT, (Table 13.1).

Visitor expenditure - Estimates of visitor expenditure are based on the amounts visitors say they have spent while in the NT. Thus, the expenditure is a direct expenditure estimate only.

Visitor nights - Estimates of visitor nights take into account the total number of nights people spend in the NT. For example, if a family of four spends 10 nights in the Territory this family represents 4 visitors and 40 visitor nights.

Vocational Education and Training (VET)

Client figures refer to the number of individuals enrolled in courses or modules with each client being counted only once regardless of the number of courses or modules they may be enrolled in. Course enrolment figures exclude students enrolled in module only activity. Students enrolled in more than one course are counted more than once in course enrolment figures. (Table 5.3).

Data published in this table 5.3 is based on the application of ABS 2004 ASGC concordance (SSD to postcode). This has resulted in totals not adding up between similar categories i.e. clients by sex / clients by Indigenous status and course enrolments by sex / course enrolments by Indigenous status. In previous editions of this publication the data was based on the NT Government's postcode apportionment approach and care should be taken when making comparisons between data published this year and before. (Table 5.3).