Year	current US$
1979	39999.9991059303
1980	29999.999329447703
1981	29999.999329447703
1986	9999.99977648258
1991	9999.99977648258
1993	9999.99977648258
1994	9999.99977648258
2006	29999.999329447703
2010	230000.004172325