2016 Census. Athiests., page-123

i dont know if you're old enough to remember but up until the last 2 or 3 census(s)(es)(')(i)(whats the plural?), data was anonymous

http://www.abs.gov.au/websitedbs/censushome.nsf/home/privacy


Names and addresses have been collected in every Census.

Names and addresses are specified in the Census Regulations as Statistical Information, like all other Census topics. This requires the ABS to collect this information as part of the Census. The requirement for all topics, including names and address, on the Census forms to be filled completely and accurately is consistent with 105 years of Australian Census practice, the Census and Statistics Act 1905 and legal advice to the ABS from the Australian Government Solicitor. The only exception is religion, which the legislation specifies is optional.