Year	current US$
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	0
1999	0
2000	182900.645432577
2001	68061.9984552374
2002	70677.3396826222
2003	81341.2736300248
2004	527821.392582669
2005	4780222.48727002
2006	9389319.48805566
2007	13931252.2092547
2008	29641734.5405008
2009	19046547.5616583
2010	30460879.4888771
2011	56823010.2228169
2012	61078856.7079436
2013	62593423.7495259
2014	61502013.7407428
2015	31395139.1345671
2016	23256140.9836026
2017	14449763.167527
2018	22735367.2107533
2019	16974961.5066258
2020	8613456.14173166
2021	24279658.589