Year	PPG (DOD, current US$)
1970	168939507.9
1971	203996145.2
1972	226245546.5
1973	256377243.8
1974	283110667.9
1975	343568365
1976	402115045.9
1977	447327486.8
1978	500427306.5
1979	601925518.8
1980	687723748.4
1981	1638380176.8
1982	3051068408
1983	3648825436
1984	4056435979.6
1985	5063985605.7
1986	5977039364.2
1987	7204116850.1
1988	7528443373.5
1989	7713650695.9
1990	8493402568.4
1991	8857863685.9
1992	9017502979.4
1993	9300872875.6
1994	9583586821.6
1995	9789956593.1
1996	9497620197.3
1997	9438270853.5
1998	9627396781.9
1999	5374811148.4
2000	5338840853.8
2001	5572556283
2002	6337040280.1
2003	7043842799.3
2004	6294821452.3
2005	5871759061.5
2006	2141206027.3
2007	2508782774.5
2008	2772465451.3
2009	4764183186.8
2010	6500051699.6
2011	7942753673.3
2012	9944728371.1
2013	11896356906.9
2014	16202538305.3
2015	19497094126.8
2016	22134594466.1
2017	25235394829.6
2018	26851072282.7
2019	27576811585.8
2020	29016047752.2
2021	28135767984.2
2022	27020248825.2