Year	GDP-US $ billion	Gross Public Debt-fed pct GDP	
1900	20.6	10.37	a
1901	22.269	9.62	a
1902	24.062	8.97	a
1903	25.93	8.49	a
1904	25.7	8.81	a
1905	28.788	7.90	a
1906	31.037	7.53	a
1907	33.851	7.26	a
1908	30.133	8.72	a
1909	32.2	8.20	a
1910	33.4	7.94	a
1911	34.3	8.06	a
1912	37.4	7.67	a
1913	39.1	7.46	a
1914	36.5	7.98	a
1915	38.675	7.91	a
1916	49.638	7.27	a
1917	59.702	9.58	a
1918	75.8	19.25	a
1919	78.3	34.98	a
1920	88.393	29.36	a
1921	73.603	32.58	a
1922	73.432	31.27	a
1923	85.4	26.17	a
1924	86.947	24.44	a
1925	90.575	22.65	a
1926	96.949	20.26	a
1927	95.5	19.38	a
1928	97.365	18.08	a
1929	103.6	16.34	a
1930	91.2	17.75	a
1931	76.5	21.96	a
1932	58.7	33.20	a
1933	56.4	39.96	a
1934	66	40.99	a
1935	73.3	39.16	a
1936	83.8	40.31	a
1937	91.9	39.64	a
1938	86.1	43.16	a
1939	92.2	43.86	a
1940	101.4	50.00	a
1941	126.7	45.41	a
1942	161.9	48.92	a
1943	198.6	71.83	a
1944	219.8	92.85	a
1945	223	116.65	a
1946	222.2	121.96	a
1947	244.1	105.35	a
1948	269.1	93.66	a
1949	267.2	94.54	a
1950	293.7	87.45	a
1951	339.3	75.24	a
1952	358.3	72.31	a
1953	379.3	70.12	a
1954	380.4	71.19	a
1955	414.7	66.16	a
1956	437.4	62.34	a
1957	461.1	59.04	a
1958	467.2	59.86	a
1959	506.6	56.74	a
1960	526.4	55.19	a
1961	544.8	53.72	a
1962	585.7	51.72	a
1963	617.8	50.23	a
1964	663.6	47.63	a
1965	719.1	44.82	a
1966	787.7	41.70	a
1967	832.4	40.90	a
1968	909.8	40.52	a
1969	984.4	37.16	a
1970	1038.3	36.69	a
1971	1126.8	36.22	a
1972	1237.9	35.22	a
1973	1382.3	33.73	a
1974	1499.5	32.27	a
1975	1637.7	33.09	a
1976	1824.6	34.47	a
1977	2030.1	34.80	a
1978	2293.8	33.86	a
1979	2562.2	32.37	a
1980	2788.1	32.60	a
1981	3126.8	31.82	a
1982	3253.2	34.96	a
1983	3534.6	38.81	a
1984	3930.9	39.80	a
1985	4217.5	43.09	a
1986	4460.1	47.54	a
1987	4736.4	49.53	a
1988	5100.4	51.00	a
1989	5482.1	52.31	a
1990	5800.5	55.28	a
1991	5992.1	60.05	a
1992	6342.3	63.10	a
1993	6667.4	65.26	a
1994	7085.2	65.54	a
1995	7414.7	66.36	a
1996	7838.5	66.10	a
1997	8270.46	64.92	a
1998	8727.02	62.77	a
1999	9286.86	60.36	a
2000	9884.17	56.95	a
2001	10218	56.47	a
2002	10572.4	58.63	a
2003	11067.8	61.08	a
2004	11788.9	62.39	a
2005	12554.5	62.97	a
2006	13310.9	63.49	a
2007	13969.3	64.07	a
2008	14270.5	69.98	a
2009	14014.8	84.74	a
2010	14551.8	92.97	a
2011	15079.6	102.63	e
2012	15812.5	105.32	e
2013	16752.4	105.96	e
2014	17782.2	105.51	e
2015	18804.1	105.17	e
2016	19790.5	105.23	e

Legend:
 a - actual reported
 i - interpolated between actual reported values
 g - 'guesstimated' projection by usgovernmentspending.com
 e - out-year estimate in US fy13 budget
 b - budgeted estimate in US fy13 budget

Source:
http://www.usgovernmentspending.com/downchart_gs.php?year=1900_2016&chart=H0-fed&units=p#copypaste
19 November 2011