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Age-specific death rates
A significant number of travellers (i.e. overseas visitors to Australia on arrival and Australian residents going abroad) state exactly 12 months or one year as their intended period of stay. Many of them stay for less than that period and on their departure from, or return to, Australia, are therefore classified as short-term. Accordingly in an attempt to maintain consistency between arrivals and departures, movements of travellers who report their actual or intended period of stay as being one year exactly are randomly allocated to long-term or
short-term in proportion to the number of movements of travellers who report their actual length of stay as up to one month more, or one month less, than one year.
Estimated resident population
The concept of estimated resident population (ERP) links people to a place of usual residence within Australia. Usual residence is that place where each person has lived or intends to live for six months or more in a reference year.
The ERP is an estimate of the Australian population obtained by adding to the estimated population at the beginning of each period the components of natural increase (on a usual residence basis) and net overseas migration. For the States and Territories, account is also taken of the estimated interstate movements involving a change of usual residence.
Estimates of the resident population are based on census counts by place of usual residence, to which are added the estimated net census undercount and Australian residents estimated to have been temporarily overseas at the time of the census.
Overseas visitors in Australia are excluded from this calculation. After each census, estimates for the preceding intercensal period are revised by incorporating an additional adjustment (intercensal discrepancy) to ensure that the total intercensal increase agrees with the difference between the ERPs at the two respective census dates.
Intercensal discrepancy is the difference between two estimates of a census year population, the first based on the latest census and the second arrived at by updating the previous census date estimate with intercensal components of population change which take account of information available from the latest census. It is caused by errors in the start and/or finish population estimates and/or in estimates of births, deaths or migration in the intervening period which cannot be attributed to a particular source.
Life expectancy refers to the average number of additional years a person of a given age and sex might expect to live if the age-specific death rates of the given period continued throughout his or her lifetime.
Long-term arrivals comprise:
Long-term departures comprise:
The median age is the age which divides the relevant population into two equal parts, half falling below the value and half exceeding it. Where the value for a particular record has not been stated, that record is excluded from the calculation.
The excess of births over deaths.
Net internal migration
The difference between the number of persons who have changed their place of usual residence by moving into a defined geographical area and the number who have changed their place of usual residence by moving out of that defined geographical area during a specified time period. This difference may be either positive or negative.
Net interstate migration
The difference between the number of persons who have changed their place of usual residence by moving into a given State or Territory and the number who have changed their place of usual residence by moving out of that State or Territory during a specified time period. This difference may be either positive or negative.
Net overseas migration
Net overseas migration is net permanent and long-term overseas migration plus an adjustment for the effect of category jumping.
Permanent arrivals (settlers)
Permanent arrivals (settlers) comprise:
This definition of settlers is used by the Department of Immigration and Multicultural Affairs (DIMA). Prior to 1985 the definition of settlers used by the Australian Bureau of Statistics (ABS) was the stated intention of the traveller only. Numerically the effect of the change in definition is insignificant. The change was made to avoid the confusion caused by minor differences between data on settlers published separately by the ABS and the DIMA.
Permanent departures are Australian residents (including former settlers) who on departure state that they are departing permanently.
For Australia, population growth is the sum of natural increase and net overseas migration. For States and Territories, population growth also includes net interstate migration. After each census, intercensal population growth also includes an allowance for intercensal discrepancy.
Rate of population growth
Population change over a period as a proportion (percentage) of the population at the beginning of the period.
Short-term arrivals comprise:
Short-term departures comprise:
Name and numerical code of a Statistical Local Area classified by State/Territory, Statistical Division and Statistical Subdivision from the Australian Standard Geographical Classification (ASGC 2001).
Total fertility rate
The sum of age-specific fertility rates (live births at each age of mother per female population of that age). It represents the number of children a woman would
bear during her lifetime if she experienced current age-specific fertility rates at each age of her reproductive life.
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