Year	current US$
1970	3169645.18184447
1971	2568382.98531148
1972	389128.495974303
1973	368296.76088329
1974	699312.214821312
1975	509270.464246975
1976	848762.388945162
1977	971478.967429665
1978	907040.195020224
1979	747189.404049369
1980	625994.120939811
1981	831257.11088553
1982	691633.707285147
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	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0