Year	current US$
1964	41799999.237060495
1965	32000000
1966	26899999.6185303
1967	29700000.762939498
1968	28500000
1969	28799999.237060502
1970	20100000.3814697
1971	12800000.1907349
1972	24860000.6103516
1973	24139999.3896484
1974	44849998.4741211
1975	61330001.8310547
1976	58290000.9155273
1977	54700000.762939505
1978	76739997.8637695
1979	81330001.8310547
1980	107699996.94824201
1981	124680000.30517599
1982	95580001.8310547
1983	87269996.6430664
1984	87559997.55859381
1985	80099998.4741211
1986	141169998.168945
1987	154119995.117188
1988	167289993.28613302
1989	255020004.272461
1990	230309997.55859402
1991	255970001.220703
1992	229149993.89648402
1993	193410003.66210902
1994	280760009.765625
1995	228119995.117188
1996	177610000.61035198
1997	142229995.727539
1998	142279998.779297
1999	226389999.38964802
2000	147190002.44140598
2001	102370002.746582
2002	104470001.22070299
2003	119500000
2004	509769989.013672
2005	156990005.493164
2006	287470001.220703
2007	176660003.66210902
2008	189029998.779297
2009	140880004.882813
2010	157229995.727539
2011	177320007.32421902
2012	304329986.57226604
2013	189570007.32421902
2014	293959991.455078
2015	110220001.22070299
2016	87389999.3896484
2017	126059997.558594
2018	220080001.831055
2019	264410003.662109
2020	312709991.455078
2021	245970001.220703
2022	209410003.66210902