Year	current US$
1980	19999.9995529652
1981	9999.99977648258
1987	9999.99977648258
1991	19999.9995529652
1999	19999.9995529652
2000	9999.99977648258
2008	59999.9986588955
2010	29999.999329447703
2011	29999.999329447703
2012	29999.999329447703
2013	29999.999329447703
2014	9999.99977648258
2015	19999.9995529652
2016	9999.99977648258