Year	current US$
1970	19249752.7719787
1971	21548974.364593
1972	26500810.8390843
1973	34540961.2522033
1974	37254275.4562225
1975	52853431.2643317
1976	54655901.2497379
1977	60351737.8260019
1978	74515387.0395019
1979	90196794.6153963
1980	117316497.605531
1981	102599764.810145
1982	97388013.6712198
1983	93058206.6408345
1984	88352437.1979853
1985	103265512.299512
1986	144583049.190849
1987	175607353.242637
1988	191373510.499295
1989	192585167.111522
1990	237766594.542949
1991	237727690.503432
1992	262401317.231611
1993	246570221.406067
1994	260757185.572028
1995	336128115.027422
1996	336918812.767159
1997	305280925.910552
1998	315871911.190782
1999	313070133.792221
2000	280983188.242728
2001	288626874.308322
2002	314597983.724157
2003	384686788.909489
2004	439425079.104786
2005	422641835.317298
2006	480280240.433365
2007	587278532.918485
2008	642721055.766333
2009	550791174.679298
2010	602499758.89723
2011	691095436.940552
2012	646687141.876429
2013	738756695.563641
2014	772689470.562746
2015	735517564.274084
2016	765602048.399923
2017	738722968.581326
2018	818665910.321876
2019	840823043.42642
2020	835686699.288805
2021	1036249921.38394