Year	PPG (DOD, current US$)
1970	7300400.9
1971	7830861
1972	6895385.6
1973	7780758.4
1974	9437482
1975	17973869.7
1976	20959869.9
1977	38270396.8
1978	59420485.3
1979	92716899.4
1980	118029697.9
1981	135901245.5
1982	180560678
1983	273948583.4
1984	319942819.9
1985	408967407.7
1986	524246436.7
1987	711720213
1988	755551588.1
1989	832270827.5
1990	850948296.7
1991	901246702.3
1992	951209642.6
1993	1002213475.5
1994	1066115552.8
1995	1099254965.8
1996	1084891764.8
1997	1025626040.4
1998	1082065038.7
1999	1053137542.5
2000	1036016292.8
2001	985499684.2
2002	1104166706.5
2003	1251824049.8
2004	1273100721
2005	1176083859
2006	1230938177.1
2007	1276072170.3
2008	1234296833.5
2009	393503090.3
2010	381775130.4
2011	363888037.6
2012	407979277.5
2013	394740120.8
2014	404514416.5
2015	409076720.8
2016	409821131.1
2017	419169499.3
2018	419049830.2
2019	475965278.2
2020	529828932.3
2021	575628997.1
2022	577592610.3