Year current US$ 2008 3000000 2009 1330000.04291534 2010 1269999.98092651 2011 1750000 2012 2950000.04768372 2013 3670000.07629395 2014 2759999.99046326 2015 2529999.97138977 2016 3000000 2017 3539999.96185303 2018 4570000.17166138 2019 5230000.01907349 2020 6050000.19073486 2021 7250000 2022 6420000.07629395