Year	current US$
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	11672.9247802298
1993	11237.8944407535
1994	1034.84827861075
1995	4662.46232637045
1996	545180.088240565
1997	3134728.99753073
1998	6521377.56385157
1999	183380680.854183
2000	1239839640.61328
2001	1025685073.23138
2002	1167778867.22169
2003	1360701253.03973
2004	2521064152.29904
2005	4105195550.13091
2006	5332038237.84079
2007	4886497642.8353
2008	7108662316.50735
2009	3445453404.3746
2010	5259762743.19856
2011	7072199357.15824
2012	410849738.243443
2013	761874258.719188
2014	439048286.206396
2015	139054778.37098
2016	120680576.142916
2017	206500134.479062
2018	138928144.379483
2019	128531249.682911
2020	62430546.584034
2021	143911214.911253