Year current US$ 2007 83400001.5258789 2008 88099998.4741211 2009 104000000 2010 105000000 2011 112000000 2012 120000000 2013 114000000 2014 117000000 2015 118000000 2016 114000000 2017 100000000 2018 77000000 2019 77000000 2020 21000000