Year current US$ 2006 750000 2007 740000.009536743 2008 879999.995231628 2009 850000.023841858 2010 910000.026226044 2011 939999.997615814 2012 469999.998807907 2013 1309999.9427795399 2014 1039999.96185303 2015 137603.99818420399 2016 134050.205349922 2017 272212.83316612197 2018 1315792.56057739 2019 203827.72386074098 2020 884239.494800568 2021 630913.67483139 2022 258447.05104827898