Year	constant 2011 international $
1990	2972.78103598509
1991	2901.70463657448
1992	2848.2139610346
1993	2774.72856192508
1994	2806.64302680447
1995	2913.03134296799
1996	3039.43823575053
1997	3103.65550177326
1998	3164.45726566716
1999	3332.54983282106
2000	3415.67783424125
2001	3464.82166127756
2002	3441.47486153126
2003	3479.69656772227
2004	3614.80599026353
2005	3718.48610777938
2006	3820.14877069514
2007	3959.28967081607
2008	4039.40658183285
2009	3853.30607548004
2010	3968.98626717689
2011	4163.24132596619
2012	4374.78280470325
2013	4529.81306609675
2014	4684.55263381374
2015	4845.54297865123
2016	5001.76443028398
2017	5169.29777306574
2018	4910.02544140604