Year	PPG (DOD, current US$)
1970	39762347.3
1971	46894651.9
1972	47046592.5
1973	69512425.4
1974	126498168.2
1975	167680508
1976	233035784.3
1977	384619638.7
1978	709759026.7
1979	982114495.8
1980	969514299.5
1981	846420784.8
1982	787658451.6
1983	790972653.6
1984	676794114.8
1985	786492031.1
1986	885341379.6
1987	1047504685.1
1988	1057686435.4
1989	936926500.1
1990	1080511815.9
1991	1139263626.6
1992	1134850187.1
1993	1126673421.6
1994	1227914967.9
1995	1285413462.8
1996	1309367385.7
1997	1213053369.8
1998	1325151414
1999	1286573465.6
2000	1229633542.9
2001	1203790026.6
2002	1335739734.6
2003	1497663898.3
2004	1598486796.3
2005	1439529599.4
2006	1538154767.3
2007	1637822930.1
2008	1465904617.8
2009	1475220958.9
2010	998854062
2011	364891918.4
2012	445469956.2
2013	585012179.8
2014	707264754.8
2015	833390843.1
2016	978102728.3
2017	1134802876.8
2018	1156416569
2019	1346508933.6
2020	1728562037.8
2021	1718806997.8
2022	1690614270.8