Year current US$ 1986 29999.999329447703 1987 29999.999329447703 1988 29999.999329447703 1989 180000.00715255702 1990 19999.9995529652 1992 9999.99977648258 1993 9999.99977648258 1994 19999.9995529652 1995 9999.99977648258 1997 9999.99977648258 1998 9999.99977648258 1999 29999.999329447703 2010 50000.0007450581 2011 9999.99977648258