CHANGES TO OFFENCE CLASSIFICATION
In June 2011, the Australian Standard Offence Classification, 2008 (ASOC08) was renamed as the Australian and New Zealand Offence Classification (ANZSOC) (cat. no. 1234.0). No changes were made to the content of the classification. ANZSOC provides a basis for the standardised collection, analysis and dissemination of offence data within crime and justice statistics. For the 2011 reference period, offence data are based on ANZSOC. For the 2010 reference period, offence data are based on the revised edition of ASOC (ASOC08) for all jurisdictions. For the 2009 reference period, offence data are based on ASOC08 for six jurisdictions (New South Wales, Victoria, South Australia, Tasmania, Northern Territory and the Australian Capital Territory). Data for Queensland and Western Australia in 2009 are based on the first edition of ASOC (ASOC97). Offence data between 2001 and 2008 are based on ASOC97. Prior to this period, offences were classified to the Australian National Classification of Offences (ANCO).
Due to the two differing versions of ASOC (1997 and 2008) used in this publication between 2001 to 2009, caution should be exercised when making comparisons to offence data over this period. Caution should be used when comparing offence data prior to 2010 for Queensland and Western Australia, and comparing data prior to 2009 between migrated and non-migrated jurisdictions. National offence estimates are also impacted by these changes in offence classification over time. For more details about these impacts, refer to Explanatory Notes paragraphs 39-44 and the Technical Note in the 2009 issue of Prisoners in Australia.