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	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	1984873.48998007
2009	963933.695846081
2010	1497856.51290722
2011	2183791.98898141
2012	2059875.41360513
2013	3357002.73313943
2014	3450116.97259982
2015	1742737.71810711
2016	1937901.1287858
2017	3189.7986384365
2018	3756.5681881399
2019	2998.84508911437
2020	2689.06129416153
2021	5469.6559273734