The US federal budget for fiscal year 2008 totaled $2.902 trillion in spending with a projected deficit of $239 billion. Most discretionary expenditures went to the military and security. Individual income taxes made up the majority of receipts, while corporate income and social security taxes also contributed significantly. The budget and GDP have been closely linked over time, with expenditures averaging around 20% of GDP since WWII. The national debt has risen whenever there are budget deficits, totaling over $9 trillion currently.