Year	constant 2011 international $
1990	19368.3936318087
1991	20053.070235264
1992	18488.7479640144
1993	18512.4944303535
1994	19119.2603832977
1995	19310.7447149148
1996	19454.4272125632
1997	19913.0342742212
1998	20874.6167817048
1999	18165.0157330388
2000	16124.5083059087
2001	17023.2786779802
2002	17193.546957243
2003	16869.7187775567
2004	15551.567766678
2005	16335.0571044486
2006	14625.525874684
2007	14714.5166223313
2008	13543.4300029197
2009	14200.1321806199
2010	13960.0846904483
2011	13813.8443163102
2012	15004.5799846856
2013	15519.3396094145
2014	16905.5463844819
2015	16335.7177290162
2016	16338.8943093614
2017	16212.7086450292