Year	constant 2011 international $
1990	26674.7669507153
1991	26303.1048141532
1992	26329.3968841275
1993	26929.9280745229
1994	27907.697857577
1995	28517.3748628811
1996	29165.9846323572
1997	30339.8836479713
1998	31262.3904492991
1999	32159.7178459885
2000	33151.6779106421
2001	33962.4172394701
2002	34664.3269378473
2003	35655.5130759791
2004	36285.597578507
2005	37172.025435583
2006	37840.0303864897
2007	38502.2742264755
2008	38068.3176663968
2009	36177.0293344155
2010	36508.7801742556
2011	36820.321718188
2012	37094.3126260054
2013	37600.7992808045
2014	38418.586445095
2015	39009.7348938003
2016	39425.1958826979
2017	39862.3455248145
2018	40157.9822285448