Year	constant 2011 international $
2009	1398.87234411582
2010	1688.62159398095
2011	1860.57179606525
2012	2157.64929058614
2013	2239.09053173108
2014	2258.97836894641
2015	2225.74328768415
2016	2245.61796877259
2017	2318.05971360737
2018	2661.07206462018