Fertility rates for 2012 have been calculated using preliminary 30 June 2012 Estimated Resident Population (ERP), based on the results of the 2011 Census of Population and Housing (2011 Census).
Rates for the period 1992 to 2011 have been revised to reflect revisions in ERP due to rebasing and recasting following the 2011 Census. For further information see Final Rebasing of Australia's Population Estimates, September Quarter 2006 – June Quarter 2011 and Recasting 20 Years of ERP.
Births data have been revised to include previously unprocessed NSW birth registrations for the period 2005 to 2010. Of the 33,122 unprocessed registrations, 32,731 registrations were in NSW and 391 were in all other states and territories. For further information see Explanatory Note 12 in Australian Demographic Statistics, Dec 2012 (cat. no. 3101.0).