Year	US Dollars
1960	-2829999.92371
1961	-529999.97139
1962	9250000
1963	5130000.11444
1964	4460000.03815
1965	18989999.77112
1966	18479999.54224
1967	59389999.38965
1968	36209999.08447
1969	127169998.16894
1970	219190002.44141
1971	214500000
1972	184220001.2207
1973	141199996.94824
1974	89239997.86377
1975	45169998.16895
1976	39500000
1977	37889999.38965
1978	15819999.69482
1979	12710000.03815
1980	31909999.84741
1981	51360000.61035
1982	51770000.45776
1983	36349998.47412
1984	95279998.7793
1985	61869998.93188
1986	56610000.61035
1987	39000000
1988	32959999.08447
1989	162990005.49316
1990	1419999.95708
1991	9000000
1992	24299999.23706
1993	25940000.53406
1994	16579999.92371
1995	15229999.54224