Year current US$ 2012 59424.929320812196 2013 98636.9848251343 2014 98729.9978733063 2015 102669.99900341 2016 64489.997923374205 2017 76010.0036859512 2018 65363.1240129471 2019 10339.9995714426 2020 21587.8635644913 2021 193000.003695488 2022 307296.15688324004