Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	90916.157314463
1975	30592.2704322678
1976	15184.5393583076
1977	5773.89892227189
1978	16560.7479889399
1979	515390.597177579
1980	1512688.72026367
1981	449153.784158451
1982	165626.815342951
1983	220799.620024475
1984	64434.4095824197
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	228985.642734618
1998	78553.4896214904
1999	77008.0840506484
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