So I've taken the idea and compiled a view of Australia by state, including the main social networks used by Aussies as if they were states.
- Growth rates are based on 9 months, with state population for March 2012 extrapolated by applying 75% of the growth for the 2010/11 year from the ABS. The growth rates for social networks were calculated backwards based on having statistics on subscribers for both March 2012 and June 2011.
- Google Plus wasn't on the scene until August with 365,000 users - since then it has grown at a rate of approximately 337% per year, making it by far the fastest growing social network.
- Some social networks have decreased in numbers. Two data points are not enough to establish a trend and Twitter tends to fluctuate up and down on a monthly basis and it is difficult to define a clear direction for the service. MySpace's trend has generally been down for several years (refer to this Infograph and data for 2011 from Social Media News).