Year	current US$
1971	19999.9995529652
1972	39999.9991059303
1973	9999.99977648258
1974	239999.994635582
1975	39999.9991059303
1976	400000.00596046395
1977	579999.983310699
1978	129999.995231628
1979	370000.00476837205
1980	19999.9995529652
1981	-29999.999329447703
1982	19999.9995529652
1983	9999.99977648258
1984	-9999.99977648258
1985	19999.9995529652
1986	-19999.9995529652
1987	-29999.999329447703
1988	-29999.999329447703
1989	-39999.9991059303
1990	-29999.999329447703
1992	79999.9982118607
1996	19999.9995529652