Year current US$ 2006 23000000 2007 28000000 2008 37000000 2009 42000000 2010 40000000 2011 47000000 2012 61000000 2013 83000000 2014 84000000 2015 94000000 2016 92000000 2017 105000000 2018 103000000 2019 120000000 2020 84000000