Year	PPG (DOD, current US$)
1970	2682000
1971	2610000
1972	4379777.5
1973	9456791.6
1974	13599580.8
1975	15916126.3
1976	20428900.5
1977	28992336.2
1978	36661558.9
1979	46226902.8
1980	53411343.1
1981	54707731.9
1982	58454979.8
1983	58699655.3
1984	63021012.2
1985	63757839.8
1986	64638072.8
1987	71403262.3
1988	71115023.2
1989	71866714.8
1990	90971518
1991	113416052.1
1992	117763888.7
1993	140423299.7
1994	154590275
1995	160047723.2
1996	153444538.2
1997	138772310.4
1998	143914846.6
1999	146434372
2000	137684256.2
2001	134027017.3
2002	146733156.9
2003	166913880.1
2004	174722785.3
2005	167465803.6
2006	163722732.5
2007	185889495.6
2008	205606279.8
2009	226396415.3
2010	299085556.7
2011	342376174.9
2012	396943888.6
2013	412288130.7
2014	417309114.1
2015	407588456
2016	390071498.3
2017	415716498.8
2018	403181671.1
2019	387604109.7
2020	393810253.8
2021	380908298.6
2022	328818094.4