Year	US Dollars
1960	4360000.13351
1961	5550000.19073
1962	4250000
1963	3809999.94278
1964	4920000.07629
1965	129999.99523
1966	11020000.45776
1967	13199999.80927
1968	10420000.07629
1969	7489999.77112
1970	33400001.52588
1971	33169998.16895
1972	25120000.83923
1973	3680000.06676
1974	2539999.96185
1975	15039999.96185
1976	3750000
1977	114980003.35693
1978	4539999.96185
1979	16709999.08447
1980	9430000.30518
1981	-360000.01431
1982	11619999.88556
1983	10789999.96185
1984	8760000.22888
1985	10270000.45776
1986	73279998.7793
1987	203029998.7793
1988	-21430000.30518
1989	-11390000.34332
1990	4949999.80927
1991	-12840000.15259
1992	-13170000.07629
1993	-14229999.54224
1994	-11199999.80927
1995	5440000.05722