Distribution of Federal Debt Held by Government Accounts (End of Fiscal Year 2011) Category Percent Social Security Trust Funds 57% Civil Service Retirement and Disability Trust Fund 17% Medicare Trust Funds 7% Military Retirement and Health Care Funds 10% Other programs and trust funds 9% Source : Department of the Treasury. Note: Data are audited by GAO. See Financial Audit: Bureau of the Public Debt’s Fiscal Years 2011 and 2010 Schedules of Federal Debt.