Year current US$ 2008 449999.9880790708 2009 299999.9988824129 2010 449999.9936670065 2011 479999.9948590993 2012 189999.99575316903 2013 159999.9964237213 2014 199999.9955296516 2015 229999.99858438945 2016 219999.99880790676 2017 299999.9951571224 2018 309999.998658895 2019 360000.00312924344