Year current US$ 1969 1330000.04291534 1970 949999.988079071 1971 2289999.96185303 1972 779999.971389771 1973 3049999.95231628 1974 2519999.98092651 1975 3569999.9332428 1976 1289999.96185303 1977 3359999.89509583 1978 5710000.03814697 1979 4619999.88555908 1980 3799999.95231628 1981 1539999.96185303 1982 4489999.771118159 1983 1250000 1984 219999.998807907 1985 740000.009536743 1986 1629999.99523163 1987 479999.989271164 1988 289999.99165535 1989 19999.9995529652 1991 -100000.00149011599