Year	current US$
1970	8434996.73323355
1971	11075071.4717889
1972	23554983.2062056
1973	61983507.8950781
1974	410384472.711353
1975	475596189.863499
1976	524388018.716697
1977	572083845.237946
1978	561118676.27373
1979	1211225341.23777
1980	203333176.957081
1981	125942476.274285
1982	97575531.6463147
1983	99848675.7800007
1984	100401028.507245
1985	129613586.693886
1986	101518968.867468
1987	99490223.4080354
1988	80665086.4845168
1989	91755321.450431
1990	138750593.624416
1991	111595249.587243
1992	129559565.114483
1993	142079862.278309
1994	142375849.268372
1995	154873830.71783
1996	178517688.382189
1997	164645485.821505
1998	100487156.652676
1999	125613865.07702
2000	226760244.590104
2001	168622820.144626
2002	162515896.548421
2003	205728338.470501
2004	240745861.309303
2005	285330602.178451
2006	287107583.484165
2007	323564487.149758
2008	387627221.692426
2009	314266798.131657
2010	338754635.187958
2011	408379473.484754
2012	390636448.287091
2013	329992861.094671
2014	418090955.65663
2015	370133432.96657
2016	273669031.194126
2017	322253544.926476
2018	418528735.090305
2019	368417914.23766
2020	239574125.689515
2021	464367385.499465