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	699981.250452313
1999	457693.940228219
2000	753060.797092126
2001	699710.495705865
2002	1262472.85184266
2003	461406.661911859
2004	130541.764906027
2005	279323.395156057
2006	777379.629725532
2007	877982.930099727
2008	1107090.491503
2009	1349583.73946214
2010	1818458.31341182
2011	3138242.09231353
2012	2954848.92919389
2013	1991293.62967466
2014	1626477.02360798
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0