Year current US$ 2005 -36187985.2822544 2006 -54296827.1315682 2007 124639327.501214 2008 67842142.910527 2009 165563772.926781 2010 462687099.040452 2011 637373349.891513 2012 868864946.532902 2013 606972745.623882 2014 571830360.174997 2015 363356069.816185 2016 636729372.336617 2017 776681593.243567 2018 1266081080.31167 2019 1167109699.24849