Year	current US$
1970	19295210.1001397
1971	9385463.94312516
1972	8690758.99788463
1973	28826392.205158
1974	27659669.9708895
1975	11542140.2629545
1976	16260521.9513025
1977	13562130.5651643
1978	10884638.4593883
1979	22434333.2320685
1980	18095040.1802659
1981	16553514.1934373
1982	13798265.3518944
1983	12000767.8110387
1984	9594678.15196839
1985	11788348.461814
1986	4564044.28345543
1987	8997143.78100045
1988	60961614.7150443
1989	93270140.6029007
1990	52752606.0477114
1991	21916967.0283196
1992	31781812.6109509
1993	30609933.8669388
1994	35193847.1617276
1995	35293049.0304357
1996	23700788.6462701
1997	18803046.3305721
1998	15295092.3693429
1999	17654534.6957146
2000	22831775.5196458
2001	8781406.17893499
2002	12532109.9683273
2003	14387047.5826281
2004	34111648.4050757
2005	72323987.2138645
2006	332375504.380591
2007	472583212.136127
2008	504839231.854524
2009	441629915.296962
2010	1894963562.34476
2011	2426182776.19517
2012	1430476169.19858
2013	1217048963.35824
2014	839988046.321486
2015	496559154.855651
2016	432320162.497974
2017	364079282.59525
2018	478700420.386669
2019	614559244.767433
2020	734383816.205642
2021	2259434226.42212