Year	current US$
1975	4223589.475062181
1976	5757301.723084443
1977	5221335.107562652
1978	6116287.055053222
1979	6664542.812430137
1980	7897973.126850376
1981	8729027.80969892
1982	10490922.00020286
1983	8703603.603603603
1984	10166739.798157087
1985	9587960.053076332
1986	10766042.780748663
1987	13603136.81557205
1988	17375032.043065883
1989	18516487.882399682
1990	21725574.934403457
1991	27013728.212247416
1992	25964664.835572712
1993	24477601.156069364
1994	30983941.82699591
1995	34124636.08466441
1996	38614335.579186626
1997	40469331.222793825
1998	34846514.74530831
1999	36969901.064415224
2000	36832815.87740657
2001	34936493.36270186
2002	30887153.046183743
2003	34074727.260802075
2004	37090721.38037633
2005	40864850.084225245
2006	61854239.363635
2007	54432391.62196791
2008	64213555.0275785
2009	63086458.346318595
2010	66674149.18341204
2011	75992122.51583876
2012	91496886.01076621
2013	90374576.14116727
2014	88781965.50801328
2015	93153566.90343438
2016	85896854.86943954
2017	92367733.78969593
2018	93972788.56988655
2019	104081221.24125959
2020	111862578.44197792
2021	144065077.055114