Year	current US$
1970	5230516.49196001
1971	5419109.08992
1972	6355985.14285714
1973	7103581.33606577
1974	7734279.36507937
1975	9071514.92063491
1976	10054453.3333333
1977	13140268.63092
1978	15489904.4444445
1979	19308416.6666667
1980	22548725.75808
1981	28984400
1982	26840125.988889
1983	28656236.6681723
1984	22404720.5747222
1985	26026894.5231584
1986	33070263.6419375
1987	33091534.4771772
1988	33902973.7526266
1989	35935669.001669
1990	36867988.0879391
1991	39309220.8271583
1992	38497668.5866262
1993	37729419.6831076
1994	41114474.5431662
1995	46436858.6375612
1996	34205019.6928158
1997	38226074.4932844
1998	33947921.791365
1999	25895113.1818263
2000	26676299.8863765
2001	24032464.9875354
2002	22565512.3719473
2003	21485250.1051222
2004	25172844.7455601
2005	39575748.0834472
2006	49949727.0589316
2007	58063434.3488859
2008	74750218.2693837
2009	96340372.9960641
2010	128552600.625164
2011	127997735.547965
2012	132396954.188601
2013	126975792.988883
2014	139652247.718746
2015	160666821.370701
2016	136532982.586649
2017	140452900.637172
2018	137967190.587776
2019	133732062.511255
2020	137887116.735111
2021	144290531.041192