Year current US$ 2008 186083373 2009 197108462 2010 70491479 2011 176346415 2012 96850645 2013 165473506 2014 241143808 2015 187851824 2016 126534584 2017 137431112 2018 78785577 2019 141805000 2020 56250587 2021 56851005 2022 58372249