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	0
2001	0
2002	6714347.26984911
2003	10574365.5719032
2004	10398081.4338786
2005	17527482.4533234
2006	61030576.6723618
2007	61449487.0175489
2008	111993447.619786
2009	59736899.1706556
2010	24866024.0725527
2011	64596070.7345399
2012	62219548.4291445
2013	56679828.3273703
2014	51667891.6892266
2015	0
2016	8077874.44448582
2017	21674644.7512905
2018	34103050.81613
2019	25462442.2599388
2020	12920184.2125975
2021	36419487.8835001