Year	PPG (DOD, current US$)
1970	64232860.3
1971	68095825.7
1972	61559341.9
1973	56393232.9
1974	49284347.8
1975	45669452.4
1976	39041939.1
1977	39177398
1978	51818036.2
1979	107528704.6
1980	216292638.8
1981	286064003.1
1982	346971305.3
1983	435888723.7
1984	407164195.4
1985	406132309.7
1986	407364766.1
1987	410917779.4
1988	379848561.5
1989	362065049.8
1990	366014620.6
1991	344612861.1
1992	308621251.9
1993	376095610.2
1994	786751455.1
1995	1560250757.3
1996	1956242540.3
1997	2413689592.1
1998	4227893751.1
1999	5614052305.7
2000	6969321294.1
2001	9402663009.2
2002	14407174851
2003	15728748964.8
2004	18464208867.5
2005	18931735707.3
2006	20198665048.2
2007	21026370911.2
2008	20733511722.2
2009	20759289741.4
2010	20385890838.3
2011	20787059398.6
2012	24245207855.6
2013	25722931338.9
2014	25229679855.8
2015	26722800805.8
2016	27702112989
2017	29986936985.4
2018	33071517702.7
2019	33319357008.3
2020	33360559030.2
2021	33277491334.9
2022	33375551047.5