Year current US$ 2007 9999.99977648258 2014 19999.9995529652 2015 79999.9982118607 2016 140000.000596046 2017 170000.00178813902 2018 360000.01430511504 2019 500000 2020 579999.983310699 2021 720000.028610229 2022 939999.997615814