The most comprehensive source of Australian statistical information is published by the Australian Bureau of Statistics (ABS). The Statistics tab will take you to the statistics section of the ABS webpage where you can search for statistics by catalogue number, release date, topic or title.
The ABS produces a range of statistics on National and International Accounts, Consumption and investment, Production, Prices, Incomes and Financial Markets
The primary World Bank collection of development indicators, compiled from officially-recognized international sources. It presents the most current and accurate global development data available, and includes national, regional and global estimates.