Year	PPG (DOD, current US$)
1970	37033600
1971	34636158.6
1972	32579541.5
1973	36932052.2
1974	36186536.7
1975	33746594.9
1976	40783709.8
1977	52099341.7
1978	131244663.9
1979	171935456.9
1980	186931530.3
1981	174606366.1
1982	186694164.9
1983	184842757.5
1984	170182597.1
1985	207418427.8
1986	245853419.5
1987	279622338.6
1988	249961045.7
1989	249514351.4
1990	251439050.2
1991	255668849.4
1992	231807035.7
1993	221094052.4
1994	232090213.8
1995	238522620.1
1996	232796204
1997	250946483.1
1998	272585989
1999	278646289.5
2000	262335436.1
2001	268448495.6
2002	334387864.8
2003	392330707.1
2004	412172946.9
2005	415695489.7
2006	421570426.5
2007	448485463.2
2008	422332803.4
2009	430459746
2010	431036378.6
2011	384070453.9
2012	345746664.1
2013	310010811.6
2014	298725484.2
2015	296863205
2016	366275610.2
2017	427376971.3
2018	498408679.3
2019	539995945.2
2020	584357331.7
2021	620028438
2022	757683345.7