Year	current US$
1970	29643501.3997397
1971	32803954.5450427
1972	46233875.0453677
1973	62735542.8190363
1974	70969878.5403323
1975	55329000.1336953
1976	48169704.4547012
1977	57319229.0615137
1978	64867283.3958735
1979	82100669.2090099
1980	97146306.0838229
1981	64585531.7629216
1982	64239379.8089221
1983	65701411.4078475
1984	64290910.0849773
1985	60424588.7097322
1986	73396552.2653973
1987	72848816.707018
1988	80232831.2561125
1989	89099251.6024104
1990	141685442.317424
1991	104059884.539761
1992	122423163.211532
1993	155960322.509443
1994	178124188.503536
1995	222131816.413681
1996	210693333.443911
1997	211064359.654395
1998	208781784.400939
1999	185187297.955835
2000	203037685.571091
2001	193851491.18316
2002	237297122.843893
2003	307528618.376823
2004	177299652.821715
2005	277057151.733931
2006	375880008.306192
2007	393016524.471857
2008	588072822.07248
2009	364774683.878723
2010	285322076.332257
2011	275105240.619238
2012	350734806.638335
2013	399426712.559696
2014	408771553.654874
2015	321461225.419602
2016	334963861.600544
2017	457959883.38861
2018	434925121.242864
2019	378629513.092132
2020	505491292.568426
2021	534893958.341343