Year current US$ 1984 19999.9995529652 1987 9999.99977648258 1988 9999.99977648258 1989 9999.99977648258 1990 9999.99977648258 1992 9999.99977648258 1993 9999.99977648258 1996 50000.0007450581 1998 9999.99977648258 2001 689999.997615814 2004 189999.99761581398