Year current US$ 1975 29999.999329447703 1979 129999.995231628 1985 9999.99977648258 1986 70000.0002980232 1987 79999.9982118607 1989 109999.999403954 1990 200000.00298023198 1991 349999.99403953605 1992 170000.00178813902 1993 490000.009536743 1994 1129999.99523163 1995 1870000.00476837 1996 289999.99165535 1997 800000.011920929 1998 50000.0007450581 1999 9999.99977648258 2000 29999.999329447703