Year	current US$
1960	250710006.71386698
1961	229149993.89648402
1962	236210006.71386698
1963	262200012.207031
1964	171690002.44140598
1965	220490005.493164
1966	230630004.882813
1967	259089996.337891
1968	239630004.882813
1969	338299987.792969
1970	274670013.42773396
1971	324510009.765625
1972	365429992.675781
1973	282000000
1974	252039993.28613302
1975	247479995.727539
1976	216139999.38964802
1977	237179992.67578098
1978	164210006.71386698
1979	133860000.610352
1980	138710006.71386698
1981	330390014.64843804
1982	33779998.779296905
1983	7639999.8664856
1984	-36880001.0681152
1985	-8819999.69482422
1986	-17569999.6948242
1987	10659999.8474121
1988	9279999.73297119
1989	51669998.1689453
1990	52279998.779296905
1991	54419998.1689453
1992	-3099999.90463257
1993	-35110000.6103516
1994	-114230003.35693401
1995	57000000
1996	-148899993.89648402
1997	-159649993.89648402
1998	-50369998.9318848
1999	-55099998.4741211