Year current US$ 2007 69999.99843537799 2008 29999.999329447703 2010 9999.99977648258 2011 19999.9995529652 2012 29999.999329447703 2013 39999.999105930285 2014 39999.9991059303 2015 9999.99977648258 2016 0 2017 0 2018 0 2019 19999.9995529652 2020 39999.9991059303 2021 49999.99888241287 2022 230000.00044703452