Year current US$ 2012 123222.582042217 2013 139069.24426555602 2014 151209.99515056598 2015 125159.99376773801 2016 194639.99569416 2017 4389.99990001321 2018 241887.465119362 2019 223759.993910789 2020 153829.753398895 2021 139300.003647804 2022 507594.64502334595