Year	constant 2011 international $
1990	4963.38059877455
1991	5113.40529217228
1992	4989.41100634802
1993	5111.51425491348
1994	5655.08786418621
1995	5939.64301225951
1996	6069.15653342491
1997	6363.44150115269
1998	6289.33401418033
1999	6279.70235768598
2000	6326.59140324452
2001	6321.82432965974
2002	6559.66157857229
2003	6703.29627632202
2004	6844.94471318989
2005	7127.03807331609
2006	7419.1834205612
2007	8006.99693622456
2008	8762.13129917064
2009	8846.69183631996
2010	9359.90321106734
2011	9841.71576452005
2012	10496.6926560657
2013	11163.4413917549
2014	11391.5135462957
2015	11759.6441637539
2016	11956.1467741705
2017	11987.1041624016
2018	12322.6568131473