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	0
1999	0
2000	46074159.1187584
2001	10286908.7760877
2002	114549.438548877
2003	8551541.03320097
2004	8531999.01993229
2005	11781572.2438681
2006	16942412.8613961
2007	15892924.964513
2008	4356088.68845649
2009	0
2010	0
2011	1500522.74670291
2012	2201369.37369179
2013	8302309.74280353
2014	17482072.8096891
2015	12925343.4956606
2016	11070634.8170299
2017	10395242.8483647
2018	21822286.2221619
2019	8220991.29983416
2020	9259970.01157292
2021	13678334.7347617