Year	DOD, current US$
1974	0
1975	19071000
1976	143514000
1977	288094000
1978	453622000
1979	589581000
1980	806480000
1981	1143308000
1982	1483137000
1983	1742428000
1984	1417054000
1985	1633296000
1986	1835636000
1987	2039422000
1988	761476000
1989	0
1991	3263000
1992	209593000
1993	403297000
1994	695126000
1995	844294000
1996	1008565000
1997	1305037000
1998	1442525000
1999	1662369000
2000	1898150000
2001	1876223000
2002	2173404000
2003	2296379000
2004	2521914000
2005	2447605000
2006	2480924000
2007	2603778000
2008	2571552000
2009	2995192000
2010	2830329000
2011	3528058000
2012	3550204000
2013	4419197000
2014	4171917000
2015	4366591000
2016	4009189000
2017	4952488000
2018	4676956000
2019	4492268000
2020	5381895000