Year	current US$
1970	745530010.2233884
1971	762780004.501343
1972	861019989.0136721
1973	749409991.2643434
1974	560029986.3815314
1975	998880004.8828127
1976	1097730027.1987915
1977	1213810019.4931033
1978	1353819989.9196625
1979	2009040039.0625026
1980	2110599970.8175652
1981	2026099968.731404
1982	1813460002.6011467
1983	2134979962.8257754
1984	1814010022.1633935
1985	2654280036.926267
1986	2764479977.1308875
1987	2152020048.141485
1988	2024350060.4629512
1989	1872070014.9536176
1990	4746860019.683847
1991	7646439964.294444
1992	5421000036.716466
1993	4057880119.8005643
1994	4542350080.490114
1995	5647339881.896975
1996	4908549998.328098
1997	3052029966.3543725
1998	3465979955.6732173
1999	3712650030.3745246
2000	3677330028.5339394
2001	3046539981.8420415
2002	3212150010.585785
2003	3681539997.100832
2004	4392480070.114139
2005	1445759994.5068367
2006	1950649993.8964891
2007	1820559997.5585933
2008	2425139961.242676
2009	2790770011.901866
2010	2460450004.577634
2011	5465630062.103272
2012	4440889915.466309
2013	4381100090.026861
2014	5785960079.193113
2015	3983880065.9179716
2016	5804090118.408208
2017	4921759941.101075
2018	3619390022.2778416
2019	2150759952.545166
2020	3409140029.90723
2021	3610820100.426674