Year	current US$
1970	6647432.91739744
1971	7552397.27170116
1972	8435573.3319308
1973	9671367.34995085
1974	11229754.9004486
1975	15098685.808818
1976	17002292.5906681
1977	19746949.9689898
1978	21034654.5745572
1979	22892039.1143029
1980	33415166.4345849
1981	40319017.2327433
1982	42661517.0337162
1983	48340823.1277352
1984	53554899.3955519
1985	66348899.144455
1986	75237144.2397125
1987	83322206.0913087
1988	91101347.9735976
1989	96621060.4923092
1990	102323178.861294
1991	104957362.768652
1992	107929157.857734
1993	116597045.598069
1994	119862707.184905
1995	152958061.168252
1996	204613803.940942
1997	222269555.578813
1998	231702178.677362
1999	254704274.440607
2000	261730036.267597
2001	312802898.844543
2002	240810023.682829
2003	306706288.956552
2004	348061291.157233
2005	295749815.245191
2006	297704542.396
2007	304590201.705393
2008	313503923.090428
2009	331882010.588035
2010	354253958.037021
2011	360350298.910866
2012	339315500.551868
2013	342238201.696788
2014	336476184.406599
2015	366514431.557043
2016	361499829.121045
2017	370399469.726052
2018	361546150.102671
2019	362335951.190455
2020	351930383.446726
2021	289034368.393259