Year current US$ 1989 19999.9995529652 1992 119999.997317791 1993 50000.0007450581 1996 9999.99977648258 1997 19999.9995529652 1998 9999.99977648258 1999 9999.99977648258 2001 9999.99977648258 2002 39999.9991059303 2003 90000.0035762787 2004 90000.0035762787 2005 180000.00715255702 2006 189999.99761581398 2007 39999.9991059303 2008 180000.00715255702 2009 100000.00149011599 2010 170000.00178813902 2011 109999.999403954 2012 29999.999329447703 2014 19999.9995529652 2015 270000.010728836 2016 170000.00178813902 2017 280000.001192093 2018 59999.9986588955 2019 360000.01430511504 2020 620000.004768372 2021 159999.99642372102 2022 400000.00596046395