Year current US$ 2007 19999.9995529652 2008 79999.9982118607 2010 9999.99977648258 2013 19999.9995529652 2014 39999.9991059303 2015 29999.999329447703 2016 39999.9991059303 2017 39999.9991059303 2018 70000.0002980232 2019 50000.0007450581 2020 39999.9991059303 2021 39999.9991059303 2022 50000.0007450581