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Australian population

This projection is based on the estimated resident population at 30 September 2009 and assumes an overall total population increase of one person every 1 minute and 10 seconds.

Source: Australian Bureau of Statistics

Australians enrolled to vote

Total number of Australians enrolled to vote based on Gazetted Enrolment as at 30 April 2010.

Source: Australian Electoral Commission

Facebook users in Australia

Based on the estimated reach of Facebook advertisements to an Australian audience as at 10 June 2010.

Source: Facebook

Twitter users in Australia

This figure is an estimate for December 2009. On the accuracy of measuring Twitter users the report says, "The method of measurement of online audiences is thought to play an important role in potentially under representing Twitter's audience size and degree of retention; for example, failing to capture visitors from online applications and devices such as mobile phones."