Year current US$ 1991 19999.9995529652 1992 29999.999329447703 1993 50000.0007450581 1994 109999.999403954 1995 19999.9995529652 1996 119999.997317791 1997 200000.00298023198 1998 109999.999403954 1999 200000.00298023198 2000 280000.001192093 2001 159999.99642372102 2002 100000.00149011599 2003 90000.0035762787 2004 319999.99284744303 2005 90000.0035762787 2007 39999.9991059303 2008 29999.999329447703 2012 109999.999403954 2013 29999.999329447703 2014 19999.9995529652 2015 29999.999329447703 2016 230000.004172325 2017 29999.999329447703 2020 19999.9995529652 2021 90000.0035762787 2022 29999.999329447703