Alternative															
	Net Interest 	 Social Security	"Medicare (net)a, Medicaid, CHIP & exchange subsidies"	All other spending	Revenue											
Fiscal Year	Percent of GDP															
2010	1.4	4.9	5.1	12.8	15.1											
2020	3.0	5.3	6.3	8.7	18.5											
2030	6.4	6.2	8.2	9.6	17.9											
2040	10.9	6.3	9.7	9.9	17.9											
																
Source: GAO's Fall  2012 analysis based on the Trustees’ assumptions for Social Security and the CMS Office of the Actuary's alternative assumptions for Medicare.																
"aMedicare spending includes offsetting receipts from premium payments and from payments by states from savings on Medicaid prescription drug costs, which reduce spending."