Year	current US$
1970	25999.0029740483
1971	26297.318838638
1972	15728.108399572
1973	0
1974	5601.60408433893
1975	40595.3513959714
1976	22874.7870268514
1977	18219.983017675
1978	7773.17328715762
1979	7533.64071811793
1980	13635.3573560919
1981	14227.3704107375
1982	27498.65372087
1983	20715.8197792984
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