Year	current US$
2002	58216899157.7038
2003	71348487360.8331
2004	99123043809.5262
2005	125606360170.003
2006	153126984975.079
2007	184594422037.885
2008	249927249603.204
2009	179014350722.334
2010	228277192099.721
2011	243517395928.492
2012	297217806829.18
2013	283856051662.635
2014	259144699141.65
2015	195194190080.933
2016	172881759134.326
2017	223115712102.64
2018	277646638256.355