Year	current US$
1970	0
1971	0
1972	0
1973	7872248.31265877
1974	46651037.0195703
1975	12336944.4021856
1976	9939685.70039263
1977	3854546.50057359
1978	3892100.92690192
1979	11008415.1737808
1980	7667257.75641784
1981	3519252.93063512
1982	3846586.29138256
1983	1708370.17180449
1984	9309135.09009105
1985	5237259.7189436
1986	0
1987	557633.836829732
1988	87448074.6800604
1989	101352668.697733
1990	33726322.7062708
1991	3931074.34402474
1992	7376676.26277876
1993	3556301.73612669
1994	3656800.77646879
1995	3496336.90198136
1996	2265530.20255397
1997	5414983.12843217
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	2828022.39872268
2005	4441898.11858745
2006	11616458.519613
2007	10670524.7864867
2008	14323583.7754044
2009	0
2010	0
2011	2345865.27958424
2012	7086125.71985327
2013	393375.161236157
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0