Year	PPG (DOD, current US$)
1970	939559305.4
1971	1260807888.7
1972	1549785827.5
1973	2991368810.9
1974	3365980296.4
1975	4632815496.7
1976	6114379902.6
1977	8912959726.9
1978	13748600491
1979	16572548616.7
1980	17038299072.8
1981	16063318142.2
1982	14888470178.6
1983	14410488197.1
1984	14131285871.5
1985	16398741782.4
1986	19497646536.7
1987	23133428591.3
1988	24480817226.2
1989	24789965821.9
1990	26692900053.7
1991	26255512108.9
1992	25762303665.8
1993	25102041792.8
1994	28444024246.1
1995	31310442886.3
1996	31292311263.5
1997	28716820456.3
1998	28490223340.7
1999	25925520612
2000	23353958638.9
2001	20869481309.5
2002	21318628653
2003	21886748998.2
2004	20432059902
2005	15516210412.6
2006	3861100197
2007	4028919897.9
2008	3294773388.1
2009	3061890020.8
2010	2662009109.6
2011	2254593628.2
2012	1647249779.9
2013	1451912858.1
2014	1124942499
2015	870194740.2
2016	1652693647.4
2017	1715902012.6
2018	1522845953.9
2019	1398178227.5
2020	1436410001.5
2021	1240363369.7
2022	1055682237