MONTHLY STATEMENT OF THE PUBLIC DEBT OF THE UNITED STATES DECEMBER 31, 2006 (Details may not add to totals) TABLE I -- SUMMARY OF TREASURY SECURITIES OUTSTANDING, DECEMBER 31, 2006 (Millions of dollars) Amount Outstanding Title Debt Held Intragovernmental Totals By the Public Holdings Marketable: Bills....................................... 940,772 3,452 944,224 Notes....................................... 2,440,466 1,394 2,441,860 Bonds....................................... 530,548 134 530,682 Treasury Inflation-Protected Securities..... 411,075 117 411,193 Federal Financing Bank 1 ................. 0 14,000 14,000 Total Marketable a........................... 4,322,860 2 19,098 4,341,958 Nonmarketable: Domestic Series............................. 29,995 0 29,995 Foreign Series.............................. 2,986 0 2,986 R.E.A. Series............................... 1 0 1 State and Local Government Series........... 257,634 0 257,634 United States Savings Securities............ 202,433 0 202,433 Government Account Series................... 79,269 3,760,080 3,839,348 Other....................................... 5,869 0 5,869 Total Nonmarketable b........................ 578,186 3,760,080 4,338,266 Total Public Debt Outstanding................. 4,901,047 3,779,178 8,680,224 TABLE II -- STATUTORY DEBT LIMIT, DECEMBER 31, 2006 Amount Outstanding Debt Held Intragovernmental Totals By the Public 19 Holdings Debt Subject to Limit: 19 Public Debt Outstanding..................... 4,901,047 3,779,178 8,680,224 Less Amounts Not Subject to Limit: Other Debt Not Subject to Limit........... 505 0 505 Unamortized Discount 3................... 32,572 40,728 73,300 Federal Financing Bank 1 ............ 0 14,000 14,000 Total Public Debt Subject to Limit.......... 4,867,970 3,724,450 8,592,419 Other Debt Subject to Limit: Guaranteed Debt of Government Agencies 4 94 0 94 Total Public Debt Subject to Limit.......... 4,868,063 3,724,450 8,592,513 Statutory Debt Limit 5..................................................................... 8,965,000 Balance of Statutory Debt Limit............................................................. 372,487 COMPILED AND PUBLISHED BY THE BUREAU OF THE PUBLIC DEBT www.publicdebt.treas.gov