. . . as a percentage of gross domestic product. Discretionary spending includes most R&D. The Congressional Budget Office projects, based on current law, that mandatory spending will rise in coming years and represent an ever-larger proportion of the federal budget and the economy. By 2024, mandatory spending will reach $13.7 trillion, or 13.9 percent of GDP.
PROJECTED RISE IN ENTITLEMENTS
DISCRETIONARY: DEFENSE AND NON-DEFENSE