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	561631.346846039
1993	317290.750530736
1994	377133.286960255
1995	138899.820033214
1996	117891.268408678
1997	86818.327717942
1998	266075.36439256
1999	216525.215244712
2000	374737.5945495
2001	208140.553864505
2002	113281.728382952
2003	125703.860232083
2004	489777.476968485
2005	7461934.4575032
2006	8026372.24842226
2007	15969109.882094
2008	16545396.2441258
2009	6079937.16666289
2010	16487511.5255977
2011	29779090.8541784
2012	27043071.3074888
2013	28103331.8228856
2014	18037931.785159
2015	9718374.41208415
2016	13444082.6046186
2017	19728669.2454791
2018	16560037.1242541
2019	5292817.71042797
2020	4385443.57525502
2021	7305104.57679151