Year current US$ 2007 23249724 2008 38587386 2009 53492878 2010 81123480 2011 129992845 2012 117340027 2013 122676418 2014 130746178 2015 125086859 2016 82150817 2017 186204144 2018 234169534 2019 252768041 2020 232386333 2021 276602873 2022 286568130