Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	19648.6117690399
1981	29849.3849224993
1982	18895.5564774318
1983	12477.4297039171
1984	0
1985	3964.74883431229
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	78688.725619866
2007	187532.827836475
2008	1701195.2887263
2009	2496616.02024242
2010	1034247.4583674
2011	2571383.24700394
2012	1798265.84276617
2013	1009122.31168895
2014	966253.889123629
2015	869961.649019183
2016	556958.772969753
2017	433349.451446978
2018	63549.1326711705
2019	0
2020	0
2021	0