Year	current US$
1975	9999.99977648258
1976	19999.9995529652
1977	29999.999329447703
1978	9999.99977648258
1979	19999.9995529652
1980	19999.9995529652
1983	9999.99977648258
1986	19999.9995529652
1989	9999.99977648258
1990	9999.99977648258
1992	19999.9995529652
2007	19999.9995529652
2008	9999.99977648258
2012	39999.9991059303
2013	59999.9986588955
2015	59999.9986588955
2016	29999.999329447703
2017	19999.9995529652
2020	59999.9986588955
2022	29999.999329447703