Year	current US$
1990	64690646.3084331
1991	55953128.4760228
1992	53474492.1131302
1993	48010683.5616892
1994	46080312.5007145
1995	45526217.7553199
1996	49069306.3597526
1997	47839935.5920853
1998	40843797.874211
1999	44538006.3767338
2000	50988869.4315032
2001	49824845.0181551
2002	54024919.5186916
2003	59303162.0258601
2004	63089737.6073894
2005	73683519.1561953
2006	83722212.2948722
2007	91125669.4543205
2008	114598777.526204
2009	84443528.7152986
2010	115317454.503632
2011	144356184.614889
2012	156279832.10183
2013	151500882.800609
2014	139734333.290221
2015	106513964.104462
2016	92810089.1412111
2017	95340170.2679008
2018	100550647.964135
2019	97274944.0661171
2020	84684071.3115443
2021	94863607.285404