Year	PPG (DOD, current US$)
1970	5076000
1971	5479788.1
1972	7363300.6
1973	8860001.6
1974	12224401.5
1975	13415000
1976	15427601.5
1977	25827151
1978	24532734.7
1979	47540142.7
1980	97324084.8
1981	132273742.3
1982	147410123.2
1983	151731758.1
1984	151705575.2
1985	176699686.1
1986	212130255.2
1987	265492495.6
1988	276980829.9
1989	288962229.1
1990	308446986.7
1991	322452862.5
1992	346226218.3
1993	350159196.9
1994	368066036.2
1995	385473760.7
1996	411862520
1997	401195506.4
1998	433604047.1
1999	431194027.1
2000	437959707.8
2001	435375298.5
2002	507400616.6
2003	568085910.8
2004	620062696.3
2005	611214728.9
2006	665966003.5
2007	654791510.3
2008	355089529.6
2009	412390528.6
2010	422010977.7
2011	434687649.3
2012	448596636.9
2013	474527456.6
2014	458004048
2015	485273331
2016	477281102.1
2017	601612669
2018	633020565.7
2019	710069437.5
2020	796609012.9
2021	815873480.4
2022	841297216.3