Year	current US$
1980	59999.9986588955
1981	29999.999329447703
1984	9999.99977648258
1985	29999.999329447703
1986	39999.9991059303
1987	50000.0007450581
1988	39999.9991059303
1989	29999.999329447703
1990	29999.999329447703
1991	90000.0035762787
1992	9999.99977648258
1993	0
1994	59999.9986588955
1995	70000.0002980232
1996	50000.0007450581
1997	59999.9986588955
1998	19999.9995529652