Year	constant 2011 international $
1990	6653.33646437198
1991	7137.65220042751
1992	7637.41067168064
1993	8192.92589996938
1994	8767.3284686439
1995	9384.89115764862
1996	9806.04729487703
1997	9423.753523012
1998	8599.98755242049
1999	8890.21088844562
2000	9189.84594187657
2001	9418.60982425008
2002	9915.06125273305
2003	10548.7293050821
2004	11135.3288454765
2005	11527.0125706745
2006	12026.7963895012
2007	12609.6618792648
2008	12759.9911030361
2009	12608.2061156605
2010	13489.3281676543
2011	13537.488341522
2012	14450.0136046902
2013	14771.1554773013
2014	14852.4361214448
2015	15256.4188350438
2016	15709.7836300773
2017	16285.6373659465
2018	16904.6983824499