Year	current US$
1973	29999.999329447703
1980	289999.99165535
1981	59999.9986588955
1982	209999.993443489
1983	29999.999329447703
1984	70000.0002980232
1985	90000.0035762787
1986	109999.999403954
1987	129999.995231628
1988	19999.9995529652
1989	9999.99977648258
1990	9999.99977648258
1993	29999.999329447703
1994	19999.9995529652
1995	59999.9986588955
1998	9999.99977648258
2001	39999.9991059303
2002	19999.9995529652