Year current US$ 1973 9999.99977648258 1976 19999.9995529652 1995 9999.99977648258 1996 9999.99977648258 1997 29999.999329447703 1998 29999.999329447703 1999 59999.9986588955 2000 9999.99977648258 2003 9999.99977648258