Year	constant 2011 international $
1990	8359.64470900796
1991	8255.27826900955
1992	7446.70047560467
1993	6865.29478082228
1994	6061.97429408596
1995	5443.00127921507
1996	5619.54926980196
1997	6270.96308755635
1998	6829.25721898041
1999	7103.43770800029
2000	7549.33179680823
2001	7943.31338443326
2002	8409.93301064748
2003	9087.70935585758
2004	10195.4159237763
2005	11237.1000425201
2006	12387.2464669633
2007	13445.5984263235
2008	14809.1256310197
2009	14764.069892045
2010	15978.2998218365
2011	16815.0091661502
2012	17068.9357767776
2013	17005.7013765512
2014	17369.9279359297
2015	16450.2157555414
2016	15996.5058378488
2017	16542.0133949089
2018	17038.5285163619