Year current US$ 2007 19999.9995529652 2008 9999.99977648258 2011 59999.9986588955 2013 9999.99977648258 2015 9999.99977648258 2016 9999.99977648258 2017 9999.99977648258 2018 0 2019 0 2020 19999.9995529652 2021 19999.9995529652 2022 29999.999329447783