(Note: The US figure is FY99...I'd think it is a bit higher by now...)
Amount
I would also add in the high costs of our policing functions. This is a quasi-military expense as well and does nothing for direct social programs. Prison population in the US is highest in absolute numbers as well as a percentage of the population.
Here's a link to some statistics: http://www.warresisters.org/piechart.htm Policies not Politics ---- Daily Landscape