Year current US$ 2006 19999.9995529652 2007 689999.997615814 2012 109999.999403954 2014 90000.0035762787 2017 29999.999329447703 2018 9999.99977648258 2019 90000.0035762787 2020 310000.002384186 2021 370000.00476837205 2022 230000.004172325