Year	current US$
1970	190593949.790932
1971	165016544.900567
1972	245985756.862676
1973	370455244.79188
1974	455066126.67733
1975	450787967.250999
1976	532061847.14353
1977	632399392.434891
1978	782889812.8886
1979	952585450.557486
1980	1133134273.5082
1981	1351378846.40424
1982	1457339213.83917
1983	1532833163.19045
1984	1550997610.51374
1985	1594003221.90898
1986	1656601843.96064
1987	1782082870.29687
1988	1533204521.15473
1989	1613452451.26993
1990	1728232836.70376
1991	2006812627.29124
1992	2577098205.52087
1993	2738395555.72822
1994	2906572549.91617
1995	3128993221.69059
1996	4038914858.09683
1997	3785918092.12861
1998	2525772268.65063
1999	3317565278.14996
2000	3697212315.78947
2001	4413906000
2002	4533450315.78947
2003	5641092421.05261
2004	6519866999.99999
2005	6442096393.01828
2006	6129494574.9959
2007	6975009248.67633
2008	9085247803.49996
2009	8741709831.18172
2010	12319805849.8752
2011	16201070295.49
2012	16159985849.1441
2013	19030916595.2585
2014	16608071683.677
2015	13923431585.1537
2016	13160047157.0346
2017	13739384043.4015
2018	15002188580.1899
2019	14022331278.8404
2020	12845603667.6934
2021	14104673433.5544