Year current US$ 2006 469999.998807907 2007 660000.026226044 2008 330000.013113022 2009 439999.997615814 2010 790000.021457672 2011 419999.986886978 2012 419999.986886978 2013 360000.01430511504 2014 689999.997615814 2015 572567.939758301 2016 263793.647289276 2017 328982.084989548 2018 685066.699981689 2019 578434.884548187 2020 862521.588802338 2021 577890.992164612 2022 517115.89097976696