NET INTEREST ON TREASURY DEBT SECURITIES (billions of dollars)
Debt Held Interest Interest Interest Percent
Net by the as % of as % of as % of Change GDP
Year Outlays Interest Public Outlays Debt GDP in GDP ($bil)
---- -------- -------- -------- -------- -------- -------- -------- --------
1940 9.5 0.9 42.8 9.5 0.9 96.8
1941 13.7 0.9 48.2 6.9 2.1 0.8 17.9 114.1
1942 35.1 1.1 67.8 3.0 1.8 0.7 26.5 144.3
1943 78.6 1.5 127.8 1.9 1.6 0.8 24.9 180.3
1944 91.3 2.2 184.8 2.4 1.4 1.1 16.0 209.2
1945 92.7 3.1 235.2 3.4 1.5 1.4 5.8 221.4
1946 55.2 4.1 241.9 7.4 1.7 1.8 0.5 222.6
1947 34.5 4.2 224.3 12.2 1.8 1.8 4.8 233.2
1948 29.8 4.3 216.3 14.6 2.0 1.7 10.0 256.6
1949 38.8 4.5 214.3 11.6 2.1 1.7 5.7 271.3
1950 42.6 4.8 219.0 11.3 2.2 1.8 0.7 273.1
1951 45.5 4.7 214.3 10.2 2.2 1.5 17.2 320.2
1952 67.7 4.7 214.8 6.9 2.2 1.3 8.9 348.7
1953 76.1 5.2 218.4 6.8 2.4 1.4 6.8 372.5
1954 70.9 4.8 224.5 6.8 2.2 1.3 1.2 377.0
1955 68.4 4.9 226.6 7.1 2.2 1.2 5.0 395.9
1956 70.6 5.1 222.2 7.2 2.3 1.2 7.9 427.0
1957 76.6 5.4 219.3 7.0 2.4 1.2 5.6 450.9
1958 82.4 5.6 226.3 6.8 2.5 1.2 2.0 460.0
1959 92.1 5.8 234.7 6.3 2.5 1.2 6.6 490.2
1960 92.2 6.9 236.8 7.5 2.9 1.3 5.9 518.9
1961 97.7 6.7 238.4 6.9 2.8 1.3 2.1 529.9
1962 106.8 6.9 248.0 6.4 2.8 1.2 7.2 567.8
1963 111.3 7.7 254.0 7.0 3.1 1.3 5.5 599.2
1964 118.5 8.2 256.8 6.9 3.2 1.3 7.1 641.5
1965 118.2 8.6 260.8 7.3 3.3 1.2 7.2 687.5
1966 134.5 9.4 263.7 7.0 3.6 1.2 9.9 755.8
1967 157.5 10.3 266.6 6.5 3.9 1.3 7.2 810.0
1968 178.1 11.1 289.5 6.2 4.0 1.3 7.2 868.4
1969 183.6 12.7 278.1 6.9 4.5 1.3 9.2 948.1
1970 195.6 14.4 283.2 7.3 5.1 1.4 6.8 1012.7
1971 210.2 14.8 303.0 7.1 5.1 1.4 6.6 1080.0
1972 230.7 15.5 322.4 6.7 4.9 1.3 8.9 1176.5
1973 245.7 17.3 340.9 7.1 5.2 1.3 11.4 1310.6
1974 269.4 21.4 343.7 8.0 6.3 1.5 9.8 1438.5
1975 332.3 23.2 394.7 7.0 6.3 1.5 8.5 1560.2
1976 371.8 26.7 477.4 7.2 6.1 1.5 11.4 1738.1
1977 409.2 29.9 549.1 7.3 5.8 1.5 13.5 1973.5
1978 458.7 35.5 607.1 7.7 6.1 1.6 12.4 2217.5
1979 504.0 42.6 640.3 8.5 6.8 1.7 12.8 2501.4
1980 590.9 52.5 711.9 8.9 7.8 1.9 8.9 2724.2
1981 678.2 68.8 789.4 10.1 9.2 2.2 12.2 3057.0
1982 745.7 85.0 924.6 11.4 9.9 2.6 5.5 3223.7
1983 808.4 89.8 1137.3 11.1 8.7 2.6 6.7 3440.7
1984 851.8 111.1 1307.0 13.0 9.1 2.9 11.7 3844.4
1985 946.3 129.5 1507.3 13.7 9.2 3.1 7.9 4146.3
1986 990.4 136.0 1740.6 13.7 8.4 3.1 6.2 4403.9
1987 1004.0 138.6 1889.8 13.8 7.6 3.0 5.6 4651.4
1988 1064.4 151.8 2051.6 14.3 7.7 3.0 7.7 5008.5
1989 1143.7 169.0 2190.7 14.8 8.0 3.1 7.8 5399.5
1990 1253.0 184.3 2411.6 14.7 8.0 3.2 6.2 5734.5
1991 1324.2 194.4 2689.0 14.7 7.6 3.3 3.4 5930.5
1992 1381.5 199.3 2999.7 14.4 7.0 3.2 5.3 6242.0
1993 1409.4 198.7 3248.4 14.1 6.4 3.0 5.5 6587.3
1994 1461.8 202.9 3433.1 13.9 6.1 2.9 5.9 6976.6
1995 1515.8 232.1 3604.4 15.3 6.6 3.2 5.2 7341.1
1996 1560.5 241.1 3734.1 15.4 6.6 3.1 5.1 7718.3
1997 1601.1 244.0 3772.3 15.2 6.5 3.0 6.4 8211.7
1998 1652.5 241.1 3721.1 14.6 6.4 2.8 5.5 8663.0
1999 1701.8 229.8 3632.4 13.5 6.2 2.5 6.3 9208.4
2000 1789.0 222.9 3409.8 12.5 6.3 2.3 6.7 9821.0
2001 1862.9 206.2 3319.6 11.1 6.1 2.0 4.1 10225.3
2002 2010.9 170.9 3540.4 8.5 5.0 1.6 3.1 10543.9
2003 2159.9 153.1 3913.4 7.1 4.1 1.4 4.1 10979.8
2004 2292.9 160.2 4295.5 7.0 3.9 1.4 6.4 11685.6
2005 2472.0 184.0 4592.2 7.4 4.1 1.5 6.5 12445.7
2006 2655.1 226.6 4829.0 8.5 4.8 1.7 6.3 13224.9
2007 2728.7 237.1 5035.1 8.7 4.8 1.7 5.1 13896.0
2008 2982.6 252.8 5803.1 8.5 4.7 1.8 3.9 14439.0
2009 3517.7 186.9 7544.7 5.3 2.8 1.3 -1.4 14237.2
2010* 3720.7 187.8 9297.7 5.0 2.2 1.3 2.7 14623.9
2011* 3833.9 250.7 10498.3 6.5 2.5 1.6 4.6 15299.0
2012* 3754.9 342.9 11472.1 9.1 3.1 2.1 5.9 16203.3
2013* 3915.4 435.9 12325.7 11.1 3.7 2.5 6.0 17182.2
2014* 4161.2 509.9 13139.3 12.3 4.0 2.8 5.9 18192.6
2015* 4385.5 571.1 13988.4 13.0 4.2 3.0 5.5 19190.4
* estimated
Note: Net Interest equals the Gross Interest on Treasury Debt Securities minus
the interest received by the trust funds and minus two items labelled
"Other interest" and "Other investment income"; Interest as % of Debt
is the Net Interest as a % of the average Debt Held by the Public
(average debt is the prior plus the current end-of-year debt, divided by 2);
Source: Budget of the United States Government, FY 2011, Historical Tables,
tables 3.1, 7.1, and 10.1
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