Year	current US$
1970	619469126.758162
1971	608073175.652404
1972	718755616.082491
1973	1058905109.97224
1974	1678711646.86424
1975	1980127864.04212
1976	2426365058.19045
1977	2981112556.4119
1978	3358021369.61611
1979	3356042715.331
1980	4728630803.33364
1981	5172276224.72009
1982	5599016190.10019
1983	4057493665.48616
1984	4247721313.65636
1985	4269905880.19135
1986	4002554716.62382
1987	3801289957.07061
1988	4007086938.48078
1989	4728387467.49604
1990	5313480334.44105
1991	5838112758.04723
1992	6409439196.22078
1993	7910248468.0968
1994	8855575115.57707
1995	10119316409.0431
1996	11382461985.0601
1997	10800941259.7502
1998	4778237789.51522
1999	7007111876.99452
2000	8293522447.2362
2001	29584405451.0102
2002	36017316239.714
2003	43319111304.9457
2004	47523120696.6276
2005	52477914901.5417
2006	66875051671.128
2007	79284083553.1877
2008	93479299961.1488
2009	98899402832.4789
2010	137808542540.178
2011	162265018513.104
2012	169806302959.039
2013	167778499273.536
2014	165442752278.082
2015	155060707737.865
2016	152964971516.392
2017	181673089322.013
2018	196673614331.007
2019	223932646789.405
2020	210574394898.138
2021	234492387370.547