government revenue grows 24% since 2008, page-2

had to chuckle at the 2012 pie chart

love the 2 categories in the spend chart of
'all other functions' and 'other purposes'

I can only guess whats in them, but the fact there is a difference betwen the 2 boggles the mind (these were a huge proportion of spend)

as far as the % thing goes, the figure there is a projection rather than an actual

this one might be better to do your maths on and gives a good idea of the trend

http://www.treasury.gov.au/PublicationsAndMedia/Publications/2012/Pocket-Guide-to-the-Australian-Tax-System/html/Appendix-C