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	571500.877889706
1987	1748161.33183834
1988	3041792.48703759
1989	4390762.8832204
1990	18309944.2016015
1991	28959775.0567667
1992	32403909.1536706
1993	37709230.0361967
1994	48499290.3053776
1995	67472712.9132737
1996	49275689.1472174
1997	70651964.9130107
1998	66422059.196194
1999	66335407.7921604
2000	68230282.2763971
2001	58158315.075047
2002	54582074.6207854
2003	63898912.8522945
2004	85222357.7224773
2005	111679263.395976
2006	102290872.140842
2007	37823120.4147045
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0