Year	constant 2011 international $
1995	5314.0830608857
1996	5480.94718403472
1997	5682.3583181997
1998	5697.64835953355
1999	5914.51524199029
2000	6325.14282087614
2001	6610.81883870442
2002	6946.93076725478
2003	7359.29593935288
2004	7917.7062783028
2005	8442.07696713224
2006	9179.19063184791
2007	10084.1347084112
2008	10719.5631872469
2009	10945.9614818601
2010	11710.3158175251
2011	12409.8623983793
2012	13102.1762815469
2013	13712.0618119315
2014	14368.5873359147
2015	14855.2697718759
2016	15399.9681735905
2017	16070.3180349212