Year current US$ 2012 648909.8072052 2013 419333.130121231 2014 1207849.97940063 2015 1121719.95639801 2016 1380040.0495529198 2017 793229.997158051 2018 1040099.7400283801 2019 2205640.07759094 2020 1472362.63751984 2021 3596499.91989136 2022 850518.465042114