Year current US$ 2006 449999.988079071 2007 70000.0002980232 2012 19999.9995529652 2013 39999.9991059303 2014 29999.999329447703 2015 29999.999329447703 2016 29999.999329447703 2017 29999.999329447703 2018 59999.9986588955 2019 29999.999329447703 2021 19999.9995529652 2022 0