Year	US Dollars
1985	186.73036
1986	626.30707
1987	324.43755
1988	299.85079
1989	376.64871
1990	456.23325
1991	367.94176
1992	427.11419
1993	343.55999
1994	244.41173
1995	334.84749
1996	245.91713
1997	306.26206
1998	133.4835
1999	-84.95747