Year current US$ 2005 90000.0035762787 2006 159999.99642372102 2007 150000.005960464 2008 180000.00715255702 2009 239999.994635582 2010 230000.004172325 2011 150000.005960464 2012 100000.00149011599 2013 70000.0002980232 2014 50000.0007450581 2015 19999.9995529652 2016 19999.9995529652 2017 29999.999329447703 2018 19999.9995529652 2021 9999.99977648258 2022 19999.9995529652