Year current US$ 2005 12513197628.4571 2006 17497909783.9136 2007 22343240640.9005 2008 51737022750.4718 2009 17101058451.8003 2010 32032130312.0567 2011 54621621391.0339 2012 61905356710.2182 2013 67702120937.4073 2014 58462195216.1934 2015 24629930659.7544 2016 23639209815.1476 2017 39798423540.2722 2018 64397139539.7717 2019 60617377004.4804 2020 18261810607.5243 2021 41990691394.7967