Year	constant 2011 international $
1990	2222.39701707647
1991	2357.87120756576
1992	2564.09387974581
1993	2794.12763799438
1994	3041.3958286647
1995	3290.75303677812
1996	3536.4813459331
1997	3729.32705405094
1998	3719.13550622437
1999	3895.48382363351
2000	4140.88367830455
2001	4368.69839443445
2002	4662.09568781267
2003	5017.04876129494
2004	5411.95037873785
2005	5875.83150460331
2006	6439.35838975133
2007	7144.63633222555
2008	7675.78112385619
2009	8185.54665803882
2010	8907.4769958553
2011	9574.18468907045
2012	10212.5027042663
2013	10858.1631965073
2014	11496.0340501032
2015	12147.9532725447
2016	12819.5307488513
2017	13543.5773618105
2018	14300.8772657304