Year current US$ 1972 209999.993443489 1973 349999.99403953605 1974 280000.001192093 1975 389999.98569488496 1976 259999.990463257 1977 170000.00178813902 1978 150000.005960464 1979 109999.999403954 1980 119999.997317791 1981 140000.000596046 1982 100000.00149011599 1983 90000.0035762787 1984 90000.0035762787 1985 70000.0002980232 1986 79999.9982118607 1987 109999.999403954 1988 119999.997317791 1989 70000.0002980232 1990 1039999.96185303 1991 19999.9995529652 1992 59999.9986588955 1993 9999.99977648258