Year current US$ 2012 215879.872441292 2013 312607.854604721 2014 331640.005111694 2015 280559.98682975804 2016 249380.007386208 2017 338679.999113083 2018 401168.346405029 2019 476179.987192154 2020 1042826.8909454299 2021 719299.972057343 2022 216847.58365154298