Year current US$ 2007 85744842 2008 23867446 2009 44645778 2010 50432614 2011 48111653 2012 108419183 2013 72294867 2014 114012952 2015 6256556 2016 24271282 2017 2161539 2018 2888325 2019 2508917 2020 3763321 2021 639994 2022 764250