nominal gdp is the main indicator used to assess economic size.
2008
nominal gdp $1.01 trillion
2009
nominal gdp $755 billion
2010
nominal gdp $744 billion
compare this to some of the Eurozone countries.
Greece went from being 35 % the size of Australia's to almost half.
2008 $357 billion
2009 $325 billion
Spain went from being 38 % larger to twice as big as compared to Australia.
according to the data the UK is falling behind fast as well.
UK
2008 $2.7 trillion
2009 $2 trillion
compare this to Italy
2008 2.3 trillion
2009 $2 trillion
when you consider that Italy exports about 21 % more than the UK it makes you question if Italy is more powerful than Britain.
http://www.imf.org/external/pubs/ft/...NGDPD&grp=0&a=