Year	current US$
1970	0
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	1113798.47347046
1993	619869.953339199
1994	0
1995	0
1996	0
1997	0
1998	9423.78830900541
1999	0
2000	0
2001	0
2002	1595.84570681981
2003	630.425237296821
2004	5179.61917770803
2005	15093.1876321946
2006	40197.6097455138
2007	118712.445011164
2008	262548.78055674
2009	4002686.18872967
2010	33559501.2363076
2011	45031463.1869907
2012	39291514.5704866
2013	27572833.964505
2014	26883773.7502758
2015	28360153.7179378
2016	30767669.9097755
2017	95756687.0261099
2018	56133125.9627053
2019	65553541.5055532
2020	73712289.2778453
2021	138929382.384808