Year	constant 2011 international $
2007	17879420252.692
2008	18432958395.888
2009	16394354696.2127
2010	16191939431.4998
2011	16811148183.9205
2012	16645727613.7268
2013	16530320251.4768
2014	16390157607.9079
2015	16372489625.4031
2016	16311971130.5647
2017	16494054392.6512