Year	US Dollars
1960	42970001.2207
1961	34529998.7793
1962	12210000.03815
1963	36240001.67847
1964	1970000.02861
1965	27520000.45776
1966	16780000.68665
1967	18549999.23706
1968	8680000.30518
1969	7119999.88556
1970	10380000.11444
1971	25489999.77112
1972	18260000.22888
1973	3509999.99046
1974	3650000.09537
1975	-5639999.86649
1976	10060000.41962
1977	7570000.17166
1978	6570000.17166
1979	29860000.61035
1980	25200000.76294
1981	22809999.46594
1982	19909999.84741
1983	22219999.31335
1984	34779998.7793
1985	56340000.15259
1986	42750000
1987	38139999.38965
1988	37540000.91553
1989	67470001.2207
1990	56549999.23706
1991	51869998.93188
1992	-51409999.84741
1993	40509998.32153
1994	34369998.93188
1995	19280000.68665
1996	14460000.03815