Year	PPG (DOD, current US$)
1970	233172588.1
1971	254792965.1
1972	334419121.8
1973	366739123.7
1974	378998193.9
1975	522279992.3
1976	695102930.2
1977	1223164571.4
1978	2330101233.8
1979	2714392148.3
1980	3412423611.2
1981	4299236471
1982	3987975417
1983	5644166367.7
1984	6649718044.1
1985	7288214242.7
1986	8343481777.2
1987	9071272781.5
1988	9091534681.9
1989	9485749448
1990	9920316970.6
1991	10003665701.6
1992	9813875870.1
1993	9943744545.9
1994	13581933331.5
1995	15075259500.5
1996	15396776634.4
1997	15813115366.1
1998	15961956834.1
1999	16354233280.1
2000	14751635808.4
2001	14533332984.6
2002	14320657124.6
2003	14479629046.8
2004	14123418885.1
2005	14108970339.8
2006	13561421252.8
2007	13978901613
2008	13328113926.3
2009	7102384140.2
2010	8787331017.8
2011	10151521365.3
2012	10413398850.4
2013	12482173604.3
2014	17564700191.9
2015	20144626316.5
2016	25566764833.4
2017	31613487360.2
2018	35480842844.8
2019	38390708595.6
2020	37811122942.7
2021	38706934875.5
2022	39484089221.8