Year current US$ 2005 29369471255.4995 2006 34354447863.8846 2007 46295308904.5221 2008 52224084123.5014 2009 29495007799.9502 2010 32638475911.3828 2011 37880833461.4984 2012 33436234506.3081 2013 32481248145.1736 2014 35370901547.3995 2015 29636825090.4955 2016 36778192879.8479 2017 35083538725.0814 2018 39941748819.8939 2019 42299640156.4235 2020 38532617463.5314 2021 41296046141.5138