Net Interest as a Share of Federal Revenue (1940-2010)	
	
Fiscal year	Net interest as a percentage of federal revenue
1940	13.7%
1941	10.8%
1942	7.2%
1943	6.4%
1944	5.1%
1945	6.9%
1946	10.5%
1947	10.9%
1948	10.4%
1949	11.5%
1950	12.2%
1951	9.0%
1952	7.1%
1953	7.4%
1954	6.9%
1955	7.4%
1956	6.8%
1957	6.7%
1958	7.0%
1959	7.3%
1960	7.5%
1961	7.1%
1962	6.9%
1963	7.3%
1964	7.3%
1965	7.4%
1966	7.2%
1967	6.9%
1968	7.2%
1969	6.8%
1970	7.5%
1971	7.9%
1972	7.5%
1973	7.5%
1974	8.1%
1975	8.3%
1976	9.0%
1977	8.4%
1978	8.9%
1979	9.2%
1980	10.2%
1981	11.5%
1982	13.8%
1983	15.0%
1984	16.7%
1985	17.6%
1986	17.7%
1987	16.2%
1988	16.7%
1989	17.0%
1990	17.9%
1991	18.4%
1992	18.3%
1993	17.2%
1994	16.1%
1995	17.2%
1996	16.6%
1997	15.4%
1998	14.0%
1999	12.6%
2000	11.0%
2001	10.4%
2002	9.2%
2003	8.6%
2004	8.5%
2005	8.5%
2006	9.4%
2007	9.2%
2008	10.0%
2009	8.9%
2010	9.1%

Source: Office of Management and Budget. 	
"Notes: Data from OMB, Budget of the United States Government for Fiscal Year 2012–Historical Tables"