Year	current US$
1973	19999.9995529652
1974	19999.9995529652
1975	9999.99977648258
1978	9999.99977648258
1979	19999.9995529652
1984	59999.9986588955
1997	9999.99977648258
2015	2819999.9332428
2016	119999.997317791