Year current US$ 1972 9999.99977648258 1973 9999.99977648258 1974 9999.99977648258 1975 19999.9995529652 1976 19999.9995529652 1977 19999.9995529652 1995 9999.99977648258 1996 19999.9995529652 1997 50000.0007450581 1998 19999.9995529652 1999 19999.9995529652