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10 When analysing time series data it is important to note issues that arose in 1984, 1995 and 2004.
STATE AND TERRITORY STATISTICS
11 Marriage statistics are based upon the state in which the marriages are registered, rather than the state of usual residence of the applicants. These factors can impact on the interpretation of state and territory data. Marriage rates are calculated using the number of marriages registered in a state or territory divided by the estimated residential population of that state or territory. Therefore, they do not accurately reflect the crude marriage rate or the age specific marriage rates of the usual residents of that state or territory.
12 Also, people who usually reside in one jurisdiction may choose to marry across state/territory and national borders. Furthermore the marriages that occur in the other Australian territories of Christmas Island, the Cocos (Keeling) Islands and Jervis Bay Territory are registered in the nearest state or territory where the marriage occurs.
ESTIMATED RESIDENT POPULATION (ERP)
13 The estimates of the population of Australia and the states and territories at 30 June of a census year are census counts based on place of usual residence, adjusted for underenumeration and the number of Australian residents estimated to have been temporarily overseas at the time of the census. An explanation of the place of usual residence conceptual basis for population estimates is given in Demographic Estimates and Projections: Concepts, Sources and Methods, Statistical Concepts Library, available on the ABS web site <www.abs.gov.au>. From the navigation bar select Themes; Demography; Concepts, Sources and Methods.
14 Post-censal estimates of the Australian population are obtained by adding to the population at the beginning of each period components of natural increase (on a usual residence basis) and net overseas migration. For states and territories, account is also taken of estimated interstate movements involving a change of usual residence. After each census, estimates are made for the preceding intercensal period by incorporating an additional quarterly adjustment (intercensal discrepancy) to ensure that the total intercensal increase agrees with the difference between the ERP at the two respective census dates.
ERP estimates by marital status
19 For country of birth, the classification used in this publication is the Standard Australian Classification of Countries (SACC), 1998, Revision 2.02 (cat. no. 1269.0). This classification supersedes the Australian Standard Classification of Countries for Social Statistics (ASCCSS) which has previously been used to classify birthplace.
20 In 2005, marriage rites were classified according to the Australian Standard Classification of Religious Groups (ASCRG), 1996 (cat. no. 1266.0.15.001). Previously, marriage rites were coded according to a non-standard classification developed within the ABS. The 2005 edition of the ASCRG was released in December 2005 and will be used for classifying marriage rites from 2006.
Confidentialising of data
21 For marriage data, cells with smaller values have been randomised to protect confidentiality. In the past different methods of confidentialising data have been used. When analysing time series data caution should always be used when comparing smaller values.
RELATED PRODUCTS AND STATISTICS
22 There are many ABS publications which may be of interest. A useful listing of related publications is available on the ABS website <www.abs.gov.au> under Statistics by Topic > Population/People. All publications released from 1998 onwards are available free of charge on the web site. Please note, older publications may no longer be available through ABS bookshops but are available through ABS libraries. Some ABS publications which may be of interest are listed below.
Australian Historical Population Statistics, (cat. no. 3105.0.65.001),
Demography; Australian Historical Population Statistics
Australian Social Trends, (cat. no. 4102.0) - issued annually
Australian Standard Classification of Religious Groups (ASCRG) 1996
(cat. no. 1266.0)
Divorces, Australia, (cat. no. 3307.0) - issued annually to 1993
Divorces, Australia, (cat. no. 3307.0.55.001) - issued annually from 2002
Estimated Resident Population by Marital Status, Age and Sex,
Australia, (cat. no. 3220.0) - issued annually to 1993
Family Characteristics, Australia (cat. no. 4442.0) - issued 1997
Marriages, Australia, (cat. no. 3306.0) - issued annually to 1993
Marriages and Divorces, Australia, (cat. no. 3310.0) - issued annually to 2002
Population by Age and Sex, Australian States and Territories, (cat. no. 3201.0) - issued annually
Population Projections, Australia, 2002 to 2101, (cat. no. 3222.0) - issued
Standard Australian Classification of Countries (SACC), (cat. no. 1269.0) - issued 1998.
23 A compendium of demographic data for each state and territory has been released annually in state and territory specific electronic products, Demography (cat. nos 3311.0-8.55.001) since the 2002 reference year. This compendium data is also available in hardcopy form between reference years 1996 to 2001 (cat. nos 3311.1-8) . Should users require detailed state and territory data on marriages, divorces or ERP prior to the release of these compendia please contact the National Information and Referral Service on 1300 135 070 or by sending an email to email@example.com.
24 Current publications and other products released by the ABS are listed in the Catalogue of Publications and Products (cat. no. 1101.0). The Catalogue is available from any ABS office or the ABS web site <www.abs.gov.au>. The ABS also issues a daily Release Advice on the web site which details products to be released in the week ahead.
Additional statistics available
25 As well as the statistics included in this and related products, the ABS may have other relevant data available on request. Inquiries should be made to the National Information and Referral Service on 1300 135 070 or by sending an email to firstname.lastname@example.org.
26 There are various special articles containing information on marriages, divorces, children, families and general living arrangements. Many of these articles can be found in Australian Social Trends (cat no. 4102.0). If this publication is accessed on the ABS website it includes a cumulative list of all articles. Other articles can also be found in Year Book Australia (cat no. 1301.0) and Household and Family Projections, Australia, 2001 to 2026 (cat no. 3236.0).
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