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	546995.701193501
1986	563829.975757653
1987	64956.6683646583
1988	37906.0003311012
1989	20351.6545918159
1990	44631.9219510152
1991	23990.4590129746
1992	12624.9188458481
1993	19377.0877251363
1994	9730.52368731582
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	601477.369582469
2005	1060914.0316783
2006	2243626.51992984
2007	2936633.05914487
2008	4310178.36324537
2009	857909.61650646
2010	1377643.00631671
2011	1943255.65595896
2012	2228202.80837468
2013	1488856.08764929
2014	1395692.25349974
2015	683886.433166678
2016	625017.233246262
2017	969329.807204496
2018	1238660.240104
2019	2498015.9113608
2020	1318277.41025058
2021	3146411.66425185