Year	constant 2010 US$
1991	4053.84958022796
1992	4045.67965260634
1993	4110.73247792456
1994	4256.27367537566
1995	4283.12362587319
1996	4628.90391822735
1997	4512.14138979658
1998	4912.98410052295
1999	4803.25092988775
2000	4671.08334916927
2001	4771.52092450066
2002	5031.42911459312
2003	4924.71036243582
2004	4823.39161993095
2005	5032.34591001819
2006	5341.32588246787
2007	5135.4161759584
2008	4952.88532523877
2009	5448.51751855941
2010	5906.25842730271
2011	6185.859645574
2012	6393.34853034612
2013	6602.28500467455
2014	6773.58226226739
2015	6936.72901289882
2016	6887.32227808041
2017	7022.75435481517
2018	5194.50854994946