Year current US$ 2008 11468188 2009 10988696 2010 2970808 2011 11894487 2012 16118188 2013 17235761 2014 6232732 2015 43740659 2016 66838962 2017 88906754 2018 40021412 2019 29752221 2020 27637566 2021 87115119 2022 134789301