Year	current US$
1975	33122921.848409478
1976	33047781.987046316
1977	35202373.03171435
1978	45547098.54641181
1979	50276324.614352785
1980	57308130.266454116
1981	69903470.46655941
1982	65677046.35358556
1983	73746846.84684683
1984	72206230.80298376
1985	69498568.33577764
1986	81856951.87165776
1987	91062876.34785046
1988	128890028.19789799
1989	124696861.34286849
1990	128022843.03133199
1991	159854234.15085608
1992	147509464.77618587
1993	151731936.416185
1994	211459930.31358886
1995	227984892.59579825
1996	242724490.62423897
1997	240572299.16897506
1998	222210120.64343163
1999	214955390.84894806
2000	223124209.5553133
2001	198270792.36275142
2002	208380061.77650812
2003	228628551.80405045
2004	264087113.32974532
2005	307654823.5397303
2006	337430397.5787865
2007	361187337.27940655
2008	422549974.8521115
2009	395458882.3501773
2010	428722910.65408427
2011	454832355.1068553
2012	509621624.93834555
2013	525521507.14078486
2014	521712404.9208053
2015	530999210.54554695
2016	490236769.7757215
2017	531914845.4913159
2018	569735215.499794
2019	579200041.5507954
2020	559256618.7346519
2021	655716740.9670686