Year	PPG (DOD, current US$)
1970	8345623.6
1971	15632737.7
1972	18801080.7
1973	32604009.3
1974	41004961.1
1975	44176274
1976	107985559.6
1977	172586331.7
1978	247712996.4
1979	297544151
1980	335385373.7
1981	376431076
1982	415775368.6
1983	438467814.9
1984	508037045.6
1985	608908114.9
1986	859783917
1987	1154250431.2
1988	1325336561.6
1989	1465790130.6
1990	1759968296.8
1991	1852016893.5
1992	1889064115.3
1993	1950490734.5
1994	2024355461.7
1995	2094644420.2
1996	2191109722
1997	2259817179.4
1998	2396827094.3
1999	2494122894.2
2000	2474063899.6
2001	2534508398.5
2002	2719379724
2003	2061274054.4
2004	2349806560
2005	2353802451.9
2006	2571601288.6
2007	2931633422
2008	3202052020.1
2009	3459730965
2010	3750800848.1
2011	4256917683.6
2012	4520746743.9
2013	5123783294.9
2014	5601161203
2015	6689494598.1
2016	7312732475.6
2017	8419133399.3
2018	9471617729.9
2019	10201698764
2020	10664691917.2
2021	10278592423.4
2022	10139605159