Year current US$ 2005 29192910650.1321 2006 30377321684.0313 2007 27569953545.7759 2008 14069809387.6673 2009 2898806136.69072 2010 6375499693.699 2011 3990521046.1963 2012 3406888380.81895 2013 13867085770.1904 2014 23225658147.7705 2015 24562618596.8923 2016 27902898420.5874 2017 31515876368.1811 2018 34257017344.8427 2019 40078923082.795 2020 34277904533.5365 2021 63863392073.2397