Year current US$ 2009 10128935 2010 14074208 2011 11890517 2012 10014580 2013 10843586 2014 1960836 2015 16607486 2016 10199913 2017 1119013 2018 591718 2019 1753201 2020 3810240 2021 6384226 2022 886411