Year current US$ 2010 19999.9995529652 2011 59999.9986588955 2013 9999.99977648258 2014 9999.99977648258 2015 70000.0002980232 2016 19999.9995529652 2017 19999.9995529652 2018 50000.0007450581 2019 39999.9991059303 2020 39999.9991059303 2021 649999.976158142 2022 9999.99977648258