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	7100488.12976963
1993	5142243.34990041
1994	4507026.09846988
1995	7328692.81343487
1996	4738773.24114664
1997	7892931.3671764
1998	3086682.8207999
1999	2997269.53251818
2000	3629134.12683317
2001	1348157.33265784
2002	1887012.90300332
2003	2564747.41471489
2004	7731513.92887954
2005	7024616.53256857
2006	65511832.7198728
2007	185098906.377003
2008	47404098.469982
2009	36812158.0463538
2010	70745123.896889
2011	73373426.5777791
2012	57697431.8135134
2013	67551684.097999
2014	77635411.2400134
2015	48319921.2375153
2016	49525253.1827551
2017	44661129.851872
2018	20769819.6532716
2019	0
2020	0
2021	0