Year current US$ 2007 63296382379.56762 2008 63845283387.68902 2009 65201331975.701935 2010 70962703537.8569 2011 69143821950.82083 2012 75923418070.19485 2013 81949054134.48853 2014 92130370874.17345 2015 93507358154.97388 2016 91998492117.05794 2017 94677692221.71672 2018 94712413499.70795 2019 100713997305.42122