Year current US$ 2006 90000.0035762787 2007 29999.999329447703 2008 90000.0035762787 2009 70000.0002980232 2010 50000.0007450581 2011 39999.9991059303 2012 19999.9995529652 2015 19999.9995529652 2019 29999.999329447703 2020 19999.9995529652 2021 29999.999329447703 2022 19999.9995529652