Year current US$ 1965 19999.9995529652 1968 9999.99977648258 1969 9999.99977648258 1970 29999.999329447703 1971 19999.9995529652 1972 50000.0007450581 1973 100000.00149011599 1974 109999.999403954 1975 140000.000596046 1976 109999.999403954 1977 59999.9986588955 1978 90000.0035762787 1980 39999.9991059303 1981 39999.9991059303 1982 29999.999329447703