Number: RL33228 Title: Federal Spending by Agency and Budget Function, FY2001-FY2006 Authors: Philip D. Winters, Government and Finance Division Abstract: This report provides data on federal spending by agency and by budget function for FY2001 through FY2006.1 The agency and function data, ranked by size, reveal the concentrated nature of federal spending. In 2006, the four largest agencies (of 51 listed) produced 82% of total outlays, and the six largest (of 19) budget functions produced 84% of total outlays. Most of the spending by the largest agencies and within the largest budget functions is either mandatory spending (such as Social Security, Medicare, and income support), defense spending, or net interest spending on federal debt. Pages: 14 Date: December 12, 2006