Year	constant 2011 international $
2008	3940.87469757483
2009	3956.03304639359
2010	4012.66579139611
2011	3701.00126696338
2012	1939.67329229625
2013	2143.19416947056
2014	2173.56709181741
2015	1909.90763386882
2016	1678.00331420979