Year	DOD, current US$
1970	2800000
1971	2800000
1972	3010000
1973	3312000
1974	3278000
1975	3281000
1976	3327000
1977	5341000
1978	6509000
1979	7178000
1980	7483000
1981	7631000
1982	7906000
1983	7703000
1984	7704000
1985	7553000
1986	7401000
1987	7250000
1988	7100000
1989	6948000
1990	6797000
1991	6647000
1992	6500000
1993	6344000
1994	6194000
1995	5943000
1996	5693000
1997	5442000
1998	5192000
1999	4942000
2000	4691000
2001	4441000
2002	4190000
2003	3940000
2004	3690000
2005	3439000
2006	3189000
2007	2939000
2008	2693000
2009	2438000
2010	2187000
2011	1938000
2012	1788000
2013	1639000
2014	1490000
2015	1341000
2016	1195000
2017	1043000
2018	894000
2019	745000
2020	596000
2021	447000
2022	298000