Year current US$ 1975 29999.999329447703 1977 39999.9991059303 1981 9999.99977648258 1983 70000.0002980232 1984 189999.99761581398 1985 129999.995231628 1986 39999.9991059303 1987 129999.995231628 1988 100000.00149011599 1989 109999.999403954 1990 189999.99761581398 1991 119999.997317791 1992 310000.002384186 1993 289999.99165535 1994 9999.99977648258 1995 9999.99977648258 1996 29999.999329447703 1997 59999.9986588955 1998 50000.0007450581 1999 9999.99977648258 2000 9999.99977648258 2001 9999.99977648258 2002 19999.9995529652 2004 9999.99977648258 2005 9999.99977648258 2011 9999.99977648258 2015 0 2016 0 2017 0 2018 0 2019 0 2021 19999.9995529652