2013 Military Spending (In Millions of US Dollars), http://milexdata.sipri.org/files/?file=SIPRI+military+expenditure+database+1988-2013.xlsx, viewed 20th April, 2014.
Citation
2013 Military Spending in Millions of Us Dollars Equal Interval, ChartsBin.com, viewed 2nd May, 2024, <http://chartsbin.com/view/23912>.