Year	US Dollars
1974	9079999.92371
1975	6360000.13351
1976	8789999.96185
1977	6000000
1978	11010000.22888
1979	2059999.94278
1980	3359999.8951
1981	2440000.05722
1982	1379999.99523
1983	910000.02623
1984	870000.00477
1985	159999.99642
1986	4039999.96185
1987	3890000.1049
1988	20610000.61035
1989	2160000.08583
1990	4400000.09537
1991	-370000.00477
1992	100000.00149
1993	-479999.98927
1994	-1299999.95232
1995	-620000.00477
1996	-2380000.11444