Year current US$ 2012 251006.662845612 2013 284480.750560761 2014 303240.00120163005 2015 380809.992551804 2016 286779.999732971 2017 247409.999370575 2018 431565.284729004 2019 325100.004673004 2020 728423.297405243 2021 661800.026893616 2022 624987.065792084