Year current US$ 2012 193309.754133224 2013 148134.91702079802 2014 136099.994182587 2015 79049.9970316887 2016 153650.000691414 2017 153009.995818138 2018 1202912.92667389 2019 734359.9796295171 2020 412162.75095939595 2021 372500.002384186 2022 507277.011871338