Year	current US$
1970	11864990.6344633
1971	9486520.54764677
1972	13536294.6564593
1973	36289182.4285518
1974	34922472.4673503
1975	34457363.2126174
1976	40205461.1765765
1977	55852961.7442446
1978	46797315.2918965
1979	65186993.5070316
1980	74758748.9638704
1981	44341232.4155946
1982	42912771.142225
1983	44248127.3380684
1984	31839469.1369079
1985	34430664.6324273
1986	51220406.0081934
1987	54472982.8627302
1988	54701352.8305052
1989	55707823.3569117
1990	59493782.2620025
1991	71864475.0927503
1992	80064561.8440196
1993	80985660.7393505
1994	99372298.0856228
1995	159637011.928779
1996	159708207.127421
1997	133456740.112623
1998	109498240.224423
1999	74391495.2462251
2000	68902108.4258312
2001	78742913.9513837
2002	83378566.5863173
2003	115069591.324197
2004	119484998.318584
2005	89342304.4731034
2006	112866035.160645
2007	164383612.665269
2008	263695359.936989
2009	236961728.029881
2010	282823142.808913
2011	392490874.003271
2012	349519916.637454
2013	382621817.297763
2014	551546132.722416
2015	401528781.741591
2016	424245530.315668
2017	445572123.049413
2018	291420486.224663
2019	266224265.201624
2020	301218595.860761
2021	281176436.997555