Year	constant 2011 international $
1990	6100.09936887791
1991	6055.47782107947
1992	5979.42109934709
1993	6079.79369382162
1994	6126.8936697699
1995	6251.32338259023
1996	6470.08554567133
1997	6725.33243181711
1998	6823.21144513355
1999	6983.36205088934
2000	7348.54327890661
2001	7535.77719324994
2002	7823.38083124272
2003	8201.15777611203
2004	8799.13400482016
2005	9371.72650629035
2006	10091.1878347252
2007	10935.7898435253
2008	11507.1263731969
2009	11630.6205667478
2010	12427.6171886976
2011	13105.3342077106
2012	13692.0311385203
2013	14272.0459272036
2014	14770.1775177356
2015	15195.8866355613
2016	15737.8942470984
2017	16366.9073715359
2018	16987.5709150723