Year	PPG (DOD, current US$)
1970	452077689.4
1971	543111087.6
1972	646812520.7
1973	1116809984
1974	1180893141.8
1975	1052430425.1
1976	803231872.3
1977	855287005
1978	2308697688.6
1979	3252582441.2
1980	4288141118.3
1981	5671268871.1
1982	8144630530.9
1983	11218087542.1
1984	10638890260.9
1985	12244907755.9
1986	17934185195.5
1987	26904744280.7
1988	27539534849.3
1989	29251220689.7
1990	31544595767.5
1991	32324971957.2
1992	26477791994.5
1993	26420641442.4
1994	27954510357
1995	28141935065.9
1996	25438639623.9
1997	22643915527
1998	23464259240.4
1999	22382477430.4
2000	30042091491.4
2001	29238354833.7
2002	28080396502.5
2003	31295132578.8
2004	32550279982.8
2005	20248210300.9
2006	3828991596.5
2007	3614472487.7
2008	3901853760.8
2009	4221325237.9
2010	4685520492.8
2011	5935943882.2
2012	6679328625.7
2013	8285018983.3
2014	9666155711.7
2015	10677451504.7
2016	11328256667.2
2017	18856596580.9
2018	25290048336.9
2019	27611607078.6
2020	32112870649.9
2021	36205089616.6
2022	40003719239.6