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CHANGES FROM PREVIOUS CENSUS SAMPLE FILES
To ensure the confidentiality of large households in occupied private dwellings, the maximum number of persons for each household is restricted to six usual residents on the 1% Basic CSF and eight usual residents on the 5% Expanded CSF. In 2006 this was achieved by removing ‘excess’ person records from large dwellings. After the removal of these records, data items such as Household Composition, Household and Family Income were re-derived to take into account the new structure. For 2011 a simpler approach has been used, where all dwellings with more than six usual residents for the 1% Basic CSF or eight usual residents for the 5% Expanded CSF have been replaced by dwellings of a similar size and from a similar region that do not have more than the maximum number of usual residents.
For 2011, geographic areas in the CSF have been based on the Australian Statistical Geography Standard (ASGS). This replaces the Australian Standard Geographical Classification (ASGC) used in previous CSFs.
For further information on geographic areas refer to Using the CSF and File Structures section.
Ancestry data items in the CSF are based on the Australian Standard Classification of Cultural and Ethnic Groups, Second Edition, Revision 1 (which was released in 2011).
In 2006, the categories selected from the Ancestry classification for inclusion in the CSFs were based on the top 20 (1% CSF) and top 30 (5% CSF) ancestry responses from the Census. For 2011, only categories with a minimum of 50,000 (1% CSF) and 30,000 (5% CSF) responses have been reported separately. All other responses have been grouped to broader categories in the classification; 1 digit level for the 1% CSF and 2 digit level for the 5% CSF. This change aims to improve consistency in reported ancestry over time.
CHANGES TO DATA ITEMS
Content of the 2011 CSFs largely duplicates the content of the 2006 CSFs. The main differences are:
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