Year	DOD, current US$
1989	0
1990	0
1991	45000
1992	160000
1993	447000
1994	458000
1995	384000
1996	334000
1997	279000
1998	222000
1999	190000
2000	149000
2001	113000
2002	474000
2003	585000
2004	948000
2005	945000
2006	3389000
2007	3217000
2008	2950000
2009	3324000
2010	5221000
2011	6805000
2012	5991000
2013	5197000
2014	4442000
2015	3687000
2016	2932000
2017	2177000
2018	1415000
2019	771000
2020	248000
2021	0