Year	constant 2011 international $
2008	2561.87840363995
2009	2580.4756108405
2010	2572.89443958843
2011	2398.32604168053
2012	2609.11987623086
2013	2741.46268183319
2014	2961.62551089742
2015	3126.45635644146
2016	3386.7324814159
2017	3425.52155313632
2018	3589.40500130212