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	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	4331678.93403648
2010	14643505.0600495
2011	12845200.37074
2012	5070614.5460993
2013	5241611.04543984
2014	10676635.3456748
2015	4692906.60569435
2016	6370050.42930064
2017	12438099.682648
2018	13357187.387212
2019	7999887.74657668
2020	10332407.7234046
2021	28352633.8571112