Year	current US$
1985	186.7303570497379
1986	626.307070239583
1987	324.43754611966017
1988	299.85078834059726
1989	376.64870771729056
1990	456.23325332110267
1991	367.9417557667467
1992	427.1141945269589
1993	343.55998632326697
1994	244.41172840157674
1995	334.8474917204478
1996	245.91712966550614
1997	306.26205984539325
1998	133.48349509669612
1999	-84.95746502631516