Year current US$ 1968 9999.99977648258 1969 19999.9995529652 1970 59999.9986588955 1971 109999.999403954 1972 289999.99165535 1973 400000.00596046395 1974 409999.99642372096 1975 519999.980926514 1976 400000.00596046395 1977 300000.011920929 1978 250000 1979 349999.99403953605 1980 1009999.99046326 1981 1009999.99046326 1982 589999.973773956 1983 449999.988079071 1984 330000.013113022 1985 319999.99284744303 1986 289999.99165535 1987 50000.0007450581 1988 159999.99642372102 1989 319999.99284744303 1990 319999.99284744303 1991 300000.011920929 1992 19999.9995529652 1993 -19999.9995529652 1994 50000.0007450581 1997 19999.9995529652 1998 140000.000596046 1999 39999.9991059303 2001 -9999.99977648258 2002 29999.999329447703