INTEREST ON TREASURY DEBT SECURITIES (billions of dollars)
Gross Interest Net Interest GDP
----------------------- Debt ----------------------- --------------- Composite
Gross billion % of % of Held by billion % of % of billion Percent Outlay Percent
Year Debt of $ Debt GDP Public of $ Debt GDP of $ Growth Deflator Change
---- ------- ------- ------ ------ ------- ------- ------ ------ ------- ------ -------- -------
1940 50.7 42.8 0.9 4.2 0.9 96.8 0.0870
1941 57.5 48.2 0.9 2.1 0.8 114.1 17.9 0.0928 6.7
1942 79.2 67.8 1.1 1.8 0.7 144.3 26.5 0.1028 10.8
1943 142.6 127.8 1.5 1.6 0.8 180.3 24.9 0.1122 9.1
1944 204.1 184.8 2.2 1.4 1.1 209.2 16.0 0.1061 -5.4
1945 260.1 235.2 3.1 1.5 1.4 221.4 5.8 0.1041 -1.9
1946 271.0 241.9 4.1 1.7 1.8 222.7 0.6 0.1071 2.9
1947 257.1 224.3 4.2 1.8 1.8 233.2 4.7 0.1162 8.5
1948 252.0 216.3 4.3 2.0 1.7 256.7 10.1 0.1273 9.6
1949 252.6 214.3 4.5 2.1 1.7 271.3 5.7 0.1246 -2.1
1950 256.9 219.0 4.8 2.2 1.8 273.2 0.7 0.1287 3.3
1951 255.3 214.3 4.7 2.2 1.5 320.3 17.2 0.1279 -0.6
1952 259.1 214.8 4.7 2.2 1.3 348.7 8.9 0.1280 0.1
1953 266.0 218.4 5.2 2.4 1.4 372.6 6.9 0.1368 6.9
1954 270.8 224.5 4.8 2.2 1.3 377.1 1.2 0.1409 3.0
1955 274.4 226.6 4.9 2.2 1.2 395.9 5.0 0.1455 3.3
1956 272.7 222.2 5.1 2.3 1.2 427.0 7.9 0.1526 4.9
1957 272.3 219.3 5.4 2.4 1.2 450.9 5.6 0.1601 4.9
1958 279.7 226.3 5.6 2.5 1.2 460.0 2.0 0.1687 5.4
1959 287.5 234.7 5.8 2.5 1.2 490.2 6.6 0.1746 3.5
1960 290.5 236.8 6.9 2.9 1.3 518.9 5.9 0.1750 0.2
1961 292.6 238.4 6.7 2.8 1.3 529.9 2.1 0.1795 2.6
1962 302.9 9.1 3.1 1.6 248.0 6.9 2.8 1.2 567.8 7.2 0.1803 0.4
1963 310.3 9.9 3.2 1.7 254.0 7.7 3.1 1.3 599.2 5.5 0.1873 3.9
1964 316.1 10.7 3.4 1.7 256.8 8.2 3.2 1.3 641.4 7.0 0.1900 1.4
1965 322.3 11.3 3.6 1.7 260.8 8.6 3.3 1.2 687.5 7.2 0.1928 1.5
1966 328.5 12.0 3.7 1.6 263.7 9.4 3.6 1.2 755.8 9.9 0.1974 2.4
1967 340.4 13.4 4.0 1.7 266.6 10.3 3.9 1.3 810.2 7.2 0.2026 2.6
1968 368.7 14.6 4.1 1.7 289.5 11.1 4.0 1.3 868.5 7.2 0.2103 3.8
1969 365.8 16.6 4.5 1.7 278.1 12.7 4.5 1.3 948.3 9.2 0.2230 6.0
1970 380.9 19.3 5.2 1.9 283.2 14.4 5.1 1.4 1012.9 6.8 0.2363 6.0
1971 408.2 21.0 5.3 1.9 303.0 14.8 5.1 1.4 1080.3 6.7 0.2519 6.6
1972 435.9 21.8 5.2 1.9 322.4 15.5 4.9 1.3 1176.9 8.9 0.2690 6.8
1973 466.3 24.2 5.4 1.8 340.9 17.3 5.2 1.3 1311.0 11.4 0.2833 5.3
1974 483.9 29.3 6.2 2.0 343.7 21.4 6.3 1.5 1438.9 9.8 0.3070 8.4
1975 541.9 32.7 6.4 2.1 394.7 23.2 6.3 1.5 1560.8 8.5 0.3384 10.2
1976 629.0 37.1 6.3 2.1 477.4 26.7 6.1 1.5 1738.8 11.4 0.3640 7.6
1977 706.4 41.9 6.3 2.1 549.1 29.9 5.8 1.5 1974.4 13.5 0.3934 8.1
1978 776.6 48.7 6.6 2.2 607.1 35.5 6.1 1.6 2218.3 12.4 0.4194 6.6
1979 829.5 59.9 7.5 2.4 640.3 42.6 6.8 1.7 2502.4 12.8 0.4552 8.5
1980 909.0 74.8 8.6 2.7 711.9 52.5 7.8 1.9 2725.4 8.9 0.5029 10.5
1981 994.8 95.5 10.0 3.1 789.4 68.8 9.2 2.2 3058.6 12.2 0.5562 10.6
1982 1137.3 117.2 11.0 3.6 924.6 85.0 9.9 2.6 3225.5 5.5 0.5958 7.1
1983 1371.7 128.7 10.3 3.7 1137.3 89.8 8.7 2.6 3442.7 6.7 0.6245 4.8
1984 1564.6 153.9 10.5 4.0 1307.0 111.1 9.1 2.9 3846.7 11.7 0.6555 5.0
1985 1817.4 178.9 10.6 4.3 1507.3 129.5 9.2 3.1 4148.9 7.9 0.6781 3.4
1986 2120.5 190.3 9.7 4.3 1740.6 136.0 8.4 3.1 4406.7 6.2 0.6947 2.4
1987 2346.0 195.2 8.7 4.2 1889.8 138.6 7.6 3.0 4654.4 5.6 0.7143 2.8
1988 2601.1 214.0 8.7 4.3 2051.6 151.8 7.7 3.0 5011.9 7.7 0.7359 3.0
1989 2867.8 240.8 8.8 4.5 2190.7 169.0 8.0 3.1 5401.7 7.8 0.7631 3.7
1990 3206.3 264.7 8.7 4.6 2411.6 184.3 8.0 3.2 5737.0 6.2 0.7882 3.3
1991 3598.2 285.4 8.4 4.8 2689.0 194.4 7.6 3.3 5934.2 3.4 0.8226 4.4
1992 4001.8 292.3 7.7 4.7 2999.7 199.3 7.0 3.2 6240.6 5.2 0.8508 3.4
1993 4351.0 292.5 7.0 4.4 3248.4 198.7 6.4 3.0 6578.4 5.4 0.8725 2.6
1994 4643.3 296.3 6.6 4.3 3433.1 202.9 6.1 2.9 6964.2 5.9 0.8902 2.0
1995 4920.6 332.4 7.0 4.5 3604.4 232.1 6.6 3.2 7325.1 5.2 0.9120 2.4
1996 5181.5 343.9 6.8 4.5 3734.1 241.1 6.6 3.1 7697.4 5.1 0.9328 2.3
1997 5369.2 355.8 6.7 4.3 3772.3 244.0 6.5 3.0 8186.6 6.4 0.9508 1.9
1998 5478.2 363.8 6.7 4.2 3721.1 241.1 6.4 2.8 8626.3 5.4 0.9603 1.0
1999 5605.5 353.5 6.4 3.9 3632.4 229.8 6.2 2.5 9127.0 5.8 0.9748 1.5
2000 5628.7 361.9 6.4 3.7 3409.8 222.9 6.3 2.3 9708.4 6.4 1.0000 2.6
2001 5769.9 359.5 6.3 3.6 3319.6 206.2 6.1 2.0 10059.8 3.6 1.0234 2.3
2002 6198.4 332.5 5.6 3.2 3540.4 170.9 5.0 1.6 10378.4 3.2 1.0425 1.9
2003 6760.0 318.1 4.9 2.9 3913.4 153.1 4.1 1.4 10803.7 4.1 1.0703 2.7
2004 7354.7 321.7 4.6 2.8 4295.5 160.2 3.9 1.4 11503.7 6.5 1.1014 2.9
2005 7905.3 352.3 4.6 2.9 4592.2 184.0 4.1 1.5 12234.9 6.4 1.1417 3.7
2006 8451.4 405.9 5.0 3.1 4829.0 226.6 4.8 1.7 13009.9 6.3 1.1809 3.4
2007 8950.7 430.0 4.9 3.2 5035.1 237.1 4.8 1.7 13642.3 4.9 1.2081 2.3
2008 9985.8 451.1 4.8 3.2 5802.7 252.8 4.7 1.8 14222.3 4.3 1.2584 4.2
2009* 12867.5 392.3 3.4 2.8 8531.4 142.7 2.0 1.0 14240.2 0.1 1.2785 1.6
2010* 14456.3 454.5 3.3 3.1 9881.9 135.9 1.5 0.9 14728.8 3.4 1.2807 0.2
2011* 15673.9 583.0 3.9 3.8 10873.1 254.5 2.5 1.6 15499.8 5.2 1.2975 1.3
2012* 16565.7 687.9 4.3 4.2 11468.4 348.8 3.1 2.1 16470.4 6.3 1.3195 1.7
2013* 17440.2 761.8 4.5 4.4 12027.1 411.6 3.5 2.4 17497.8 6.2 1.3443 1.9
2014* 18350.0 823.2 4.6 4.5 12594.8 460.1 3.7 2.5 18386.4 5.1 1.3705 1.9
* 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";
For Gross Interest, % of Debt is the % of the average Gross Debt;
For Net Interest, % of Debt is the % of the average Debt Held by the Public;
(average debt is the prior plus the current end-of-year debt, divided by 2);
Inflation in the graphs is the percent change in the Composite Outlay Deflator
Source: Budget of the United States Government, FY 2010, Historical Tables,
tables 3.2, 7.1, and 10.1
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