Year	current US$
1965	0
1966	0
1967	0
1968	0
1969	0
1970	13517311.734626101
1971	15267937.44551116
1972	95044727.09567335
1973	-190457101.53250864
1974	313239293.0402677
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
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	-1006217821.7821782
2005	-1330421455.9386973
2006	-559648093.8416423
2007	2499299158.990789
2008	7548209110.106665
2009	6541159212.884824
2010	3577150489.11412