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	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	75892.4754765946
2004	164645.164431187
2005	275240.399951286
2006	488750.086203866
2007	844629.655435111
2008	495671.405844373
2009	24335.8907516976
2010	344432.597156975
2011	3229500.0733471
2012	4131579.62240063
2013	2771441.48604578
2014	6042739.34045694
2015	4165067.02354994
2016	7624470.90370967
2017	16418945.7636993
2018	3537093.01237902
2019	2114277.08435097
2020	582729.453550781
2021	651532.054284917