Year	US Dollars
1960	248539993.28613
1961	186440002.44141
1962	132610000.61035
1963	97660003.66211
1964	39450000.76294
1965	54500000
1966	12020000.45776
1967	9640000.34332
1968	5889999.86649
1969	23129999.16077
1970	40380001.06812
1971	35209999.08447
1972	40520000.45776
1973	38330001.83105
1974	94050003.05176
1975	117930000.30518
1976	205830001.83105
1977	318339996.33789
1978	143970001.2207
1979	79940002.44141
1980	128160003.66211
1981	115919998.16894
1982	78620002.74658
1983	47259998.32153
1984	43569999.69482
1985	87250000
1986	72779998.7793
1987	78419998.16895
1988	77690002.44141
1989	72089996.33789
1990	63130001.06812
1991	62630001.06812
1992	39279998.7793
1993	51689998.62671
1994	65150001.52588
1995	28870000.83923
1996	31430000.30518