Year current US$ 1960 519999.980926514 1961 509999.99046325695 1962 560000.002384186 1965 569999.992847443 1966 109999.999403954 1967 419999.986886978 1968 360000.01430511504 1969 259999.990463257 1970 29999.999329447703 1971 790000.021457672 1972 1250000 1973 959999.978542328 1974 50000.0007450581 1975 50000.0007450581 1976 -9999.99977648258 1977 -140000.000596046 1978 -39999.9991059303 1979 9999.99977648258 1980 39999.9991059303 1981 29999.999329447703 1982 -100000.00149011599 1983 -109999.999403954 1984 -70000.0002980232 1985 100000.00149011599 1986 -119999.997317791 1987 -140000.000596046 1988 -159999.99642372102 1989 70000.0002980232 1990 -180000.00715255702 1991 2640000.10490417 1992 -180000.00715255702 1993 -170000.00178813902 1994 -70000.0002980232 1998 9999.99977648258