Year current US$ 2005 7542192644.81537 2006 11427282947.4263 2007 16178072202.9888 2008 41236346805.2482 2009 11137298908.9171 2010 23321128236.5695 2011 39090008556.0676 2012 46305502501.9474 2013 51969682483.4151 2014 40026742066.3279 2015 11170013967.5683 2016 10155147924.1622 2017 21254919895.5386 2018 38198995638.0346 2019 36136223554.4143 2020 6814773432.7267 2021 20629317771.9385