Year current US$ 2008 389629412.62633663 2009 94523478.74409558 2010 113147264.58255172 2011 310687152.533219 2012 74321181.80019477 2013 56354713.82371887 2014 24137537.06518158 2015 136329241.4478706 2016 368242491.595834 2017 339874560.2718463 2018 361105042.3194882 2019 277720058.7539856 2020 285529502.2650218 2021 289034359.81816393 2022 255186577.9942708 2023 276719634.1054806