Year	PPG (DOD, current US$)
1970	255548111.5
1971	353353853.5
1972	400832810.3
1973	583195403.9
1974	703548278.3
1975	966465061.7
1976	1202634484.7
1977	1923562130.7
1978	2822956025.4
1979	3696673722.2
1980	4326945129.8
1981	4412917215.6
1982	5019040297.9
1983	4843381061.3
1984	4758716282.5
1985	5791163759.1
1986	7568780934.7
1987	9283173252.5
1988	8609667533.2
1989	9067854213.3
1990	10665474515.7
1991	11264584405.2
1992	11243940128.6
1993	11110602379.9
1994	11240980480.3
1995	11902075654.8
1996	11366658369.7
1997	10427060959.8
1998	10799676637.8
1999	9699057824.5
2000	9063446458.9
2001	8590705807.6
2002	9101419989.2
2003	9696151525.6
2004	11090584224.7
2005	9974818021.3
2006	10833186445.6
2007	11657862269.7
2008	10639561413.8
2009	12726239907.4
2010	9413451309.5
2011	9897100599.5
2012	5050959750.9
2013	6370463011.7
2014	6620290862.7
2015	8509794119.1
2016	8368883419.9
2017	10445294296.8
2018	13234372478.8
2019	15748099634.7
2020	20151652048.4
2021	23311163691.2
2022	26447274026.8