Year	current US$
1976	1051371.2104638934
1977	889658.4143434917
1978	589718.7286182012
1979	1405414.7947541708
1980	2612661.237963376
1981	-1979437.6021884663
1982	1571909.039270561
1983	-1403738.5547285154
1984	651662.6535108255
1985	0
1986	938998.7553409602
1987	2821424.5408220845
1988	6129764.89379625
1989	9653335.439945005
1990	5902302.834979108
1991	3724494.7732293145
1992	1112868.2715398583
1993	8877681.566439893
1994	3362474.7814391395
1995	42000.042000042005
1996	-3823014.54757641
1997	21705645.974746644
1998	3629729.5756447045
1999	10987365.46560599
2000	17501.43555525142
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0