Year	current US$
2003	11051089610.393587
2004	11856331737.46965
2005	12585682325.185337
2006	13057958906.881342
2007	15936190762.055647
2008	18496049260.35292
2009	20688220005.093887
2010	25201190204.16185
2011	20895406713.325657
2012	23906290395.92779
2013	25101207072.81003
2014	26351211708.19342
2015	26018006590.459705
2016	27557594253.847645