Year	current US$
2004	36921190580.175
2005	46351018316.3104
2006	59235851063.8574
2007	72320368191.4619
2008	101005263129.474
2009	96370004240.3705
2010	131273760630.405
2011	152838829686.371
2012	158078887380.602
2013	223520194914.133
2014	227957177371.697
2015	194752694758.68
2016	189114345585.994
2017	191586766928.512