For reliable Australian statistics for your assignments and research try the Australian Bureau of Statistics website. Resources available on this site include statistics by region and local government area, the Consumer price index, National and State year books, labour force figures, average weekly earnings, industry and trade figures, many publications on issues such as health and education, and much more. The site is updated very regularly. For example, did you know that as at today 23 February 2006 at 15:30:21 (Canberra time), the resident population of Australia is projected to be: 20,501,364!
The 2001 Census data is also available on the ABS web site.