Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	49877487.2122631
1975	30220526.6426268
1976	17319254.6433542
1977	62706434.5993229
1978	8053597.82990312
1979	10223483.0900403
1980	20565523.447831
1981	21075207.7202034
1982	13375249.2403527
1983	10959696.4285151
1984	5063856.22007655
1985	9046367.92344993
1986	2826705.13316921
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	0
2003	0
2004	1468727.69883128
2005	13010327.3254067
2006	44799078.3464111
2007	54283992.2949567
2008	125288558.673985
2009	127468882.951832
2010	109581392.395724
2011	298846645.903051
2012	383874707.319657
2013	277914198.107026
2014	213037166.865515
2015	147408864.271105
2016	139845483.339728
2017	111211313.091529
2018	88433210.7687929
2019	76270595.4821747
2020	89647839.721633
2021	318238763.205852