Year	current US$
1977	50000.0007450581
1978	140000.000596046
1979	119999.997317791
1980	219999.998807907
1981	180000.00715255702
1982	59999.9986588955
1983	19999.9995529652
1984	29999.999329447703
1985	19999.9995529652
1986	50000.0007450581
1987	100000.00149011599
1989	9999.99977648258
1991	70000.0002980232