Year	DOD, current US$
1991	60531000
1992	152235000
1993	158002000
1994	415410000
1995	443540000
1996	452872000
1997	501322000
1998	697094000
1999	828896000
2000	824229000
2001	844337000
2002	958416000
2003	1265920000
2004	1497831000
2005	1453051000
2006	1330716000
2007	1603616000
2008	1206673000
2009	1509462000
2010	1338325000
2011	1243760000
2012	1209848000
2013	1201016000
2014	969004000
2015	785901000
2016	920164000
2017	1147850000
2018	831214000
2019	726983000
2020	701430000
2021	575274000
2022	470862000