Year current US$ 2007 -1935142635.69332 2008 -2374441146.91833 2009 400937584.811183 2010 -8173961.13363752 2011 -2323406290.67239 2012 -1881303406.03143 2013 75933286.4291359 2014 -136721201.97534 2015 901306705.006522 2016 795872907.290752 2017 418806723.778194 2018 2124834552.13433 2019 1670512508.84065 2020 2897833477.82446 2021 3431658318.31232