Year	constant 2011 international $
1990	3613.16006708598
1991	3734.11447805658
1992	3854.21673217039
1993	4076.94640112359
1994	4264.88599888322
1995	4462.84813946005
1996	4601.06589066959
1997	4868.31979521956
1998	5071.32827023095
1999	5261.45415535132
2000	5543.18980925728
2001	5418.81811326157
2002	5589.10397904104
2003	5871.35194346431
2004	6138.96155115842
2005	6469.47070538766
2006	6912.17243647481
2007	7327.6365433173
2008	7708.49468386562
2009	7925.95417566246
2010	8502.88946500842
2011	9155.65879207134
2012	9980.02270677105
2013	10238.7122615563
2014	10646.802268597
2015	11077.5973945364
2016	11447.4152021947
2017	11705.8437834093
2018	11955.4997097489