Year current US$ 2012 74182.2198033333 2013 94565.8683776855 2014 65600.0003218651 2015 121009.99802351 2016 106229.998171329 2017 83559.9973797798 2018 64274.400472641006 2019 512889.98126983596 2020 209739.923477173 2021 208800.002932549 2022 163522.094488144