Year current US$ 2005 19999.9995529652 2006 49999.99888241295 2007 79999.99821186069 2008 39999.99910593032 2009 29999.99932944774 2010 9999.99977648258 2014 29999.999329447703 2015 19999.99955296516 2016 19999.99955296516 2017 89999.99798834324 2018 149999.9947845932 2019 179999.99411404086 2020 410000.0020116564 2021 599999.9865889543 2022 1840000.001713633