Year current US$ 2012 110280.491411686 2013 212033.629417419 2014 209600.001573563 2015 182510.00344753297 2016 147699.996829033 2017 244829.997420311 2018 164345.800876617 2019 479479.99835014297 2020 214926.525950432 2021 321399.986743927 2022 698831.081390381