Year	constant 2011 international $
1994	2420.89212692963
1995	2618.06865698013
1996	2786.27062450248
1997	2897.58946343264
1998	3023.94277797885
1999	3186.31952123507
2000	3272.40653483305
2001	3299.86036509633
2002	3299.37784605387
2003	3346.28771593102
2004	3493.88288791466
2005	3631.33915732098
2006	3702.5950647673
2007	3859.2419233462
2008	3937.11835409714
2009	3733.09183183865
2010	3855.4168326623
2011	4047.04576344586
2012	4244.70747134433
2013	4397.11279977668
2014	4561.20739726015
2015	4708.56051901751
2016	4859.33694042717
2017	5024.92073467685
2018	4789.84011626877