Year current US$ 2006 3339999.91416931 2007 2970000.02861023 2008 3579999.92370605 2009 3369999.8855590797 2010 2150000.09536743 2011 1159999.9666214 2012 959999.978542328 2013 1190000.0572204601 2014 810000.002384186 2015 930000.007152557 2016 1080000.04291534 2017 1139999.98569489 2018 1299999.95231628 2019 1210000.03814697 2020 1200000.04768372 2021 1070000.05245209 2022 910000.026226044