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	267382.756442732
1995	62173.836867652
1996	266375.591472009
1997	1047632.29492201
1998	802178.513018351
1999	488817.128163738
2000	397616.100864643
2001	149738.046081055
2002	0
2003	0
2004	28719.188279326
2005	41898.5092734086
2006	116606.94445883
2007	131697.439514959
2008	166063.573725451
2009	202437.560919321
2010	454614.578352954
2011	387872777.988856
2012	336652320.358803
2013	121275366.171527
2014	184266251.828956
2015	44297753.1651939
2016	0
2017	29623289.655757
2018	94074282.2912698
2019	29797678.2911422
2020	35970542.7703754
2021	406566633.141519