Year current US$ 1988 9999.99977648258 1991 29999.999329447703 2011 9999.99977648258 2012 70000.0002980232 2013 70000.0002980232 2014 70000.0002980232 2015 209999.993443489 2016 39999.9991059303 2017 109999.999403954 2018 19999.9995529652 2019 9999.99977648258 2020 9999.99977648258 2021 9999.99977648258 2022 9999.99977648258