Year	DOD, current US$
1981	120000
1982	140000
1983	160000
1984	180000
1985	200000
1986	220000
1987	220000
1988	526000
1989	24681743.7
1990	29684201.2
1991	32384888.9
1992	29023582.4
1993	12542373.5
1994	14309563.3
1995	0
1996	319510
1997	660400
1998	963495
1999	904495
2000	77000
2001	78820.6
2002	49332.9
2003	39827.4
2004	32255.5
2005	18185.3
2006	16324.2
2007	0
2008	81049000
2009	230049000
2010	379049000
2011	496707000
2012	842917000
2013	962747000
2014	1087204000
2015	1319760000
2016	1727000000
2017	1778356000
2018	2366278000
2019	3412500000
2020	3781960000
2021	4437317000
2022	4609693000