Year current US$ 2005 0 2006 0 2007 0 2008 689999.993890524 2009 479999.99858439004 2010 939999.986439943 2011 1120000.00104308 2012 679999.992251396 2013 609999.999403954 2014 439999.990165234 2015 469999.99135732703 2016 429999.99783933203 2017 459999.99716877897 2018 489999.996498227 2019 999999.9925494189 2020 490000.00022351695 2021 2599999.9567866297 2022 1580000.0131130223