Year	current US$
1970	19916310.7771369
1971	34132963.0877097
1972	38378938.1734973
1973	69415824.1515822
1974	405043488.400114
1975	368612942.351577
1976	377299733.973365
1977	296150348.057469
1978	319007801.590615
1979	856459103.271185
1980	1187914093.81307
1981	1175763351.94972
1982	867848773.790492
1983	1582378965.06456
1984	2308080991.5558
1985	2645197171.03695
1986	1193767385.46555
1987	1856712441.65725
1988	1327078607.92703
1989	2202825531.19263
1990	2888600352.92032
1991	1527557683.69934
1992	1648456792.73454
1993	1630219419.60366
1994	1621811428.47295
1995	1850490056.32112
1996	2712949582.85461
1997	2548633240.05588
1998	1652205693.0725
1999	3232068717.56756
2000	6770708111.74628
2001	5296594588.57308
2002	6296927604.37652
2003	7004509982.35434
2004	8891746546.25086
2005	15149465053.4376
2006	19564422897.4056
2007	20739877079.2246
2008	30008219800.1617
2009	16526714177.3069
2010	24038261927.3004
2011	38867275934.7195
2012	36402303346.2428
2013	32519484428.5425
2014	33713382247.8826
2015	15166475403.8591
2016	12069451946.4785
2017	18932624719.6168
2018	29451093976.9545
2019	26361905924.7649
2020	13462887141.0231
2021	35438906336.3698