Year	current US$
2002	7386297304.643894
2003	9466370577.680008
2004	9953043391.716305
2005	10702318166.806221
2006	10731314621.363747
2007	13300850759.647947
2008	15954353872.206987
2009	18487965114.391068
2010	23028409265.671963
2011	18426854927.32437
2012	20961906988.97178
2013	21825521786.539154
2014	23164146366.61722
2015	23061658331.636948
2016	24707347796.053852