Year	constant 2010 US$
1991	3682.32852537729
1992	3661.83708019387
1993	3739.71874722363
1994	4022.22325313836
1995	4255.38699754969
1996	4551.1843164652
1997	4834.71304767083
1998	4892.49963307137
1999	4763.96193262323
2000	5001.55218670624
2001	5036.5799058457
2002	5020.60151890707
2003	5137.29333515962
2004	5230.43715084466
2005	5591.10382169751
2006	5902.99134718653
2007	6305.57381213438
2008	6538.19789227328
2009	6841.97389347116
2010	7182.90510774141
2011	7395.55747169407
2012	7806.32179237109
2013	7854.38109580006
2014	7957.88420329207
2015	8205.99790177549
2016	8119.2597969077
2017	8262.69432866108