Year	constant 2011 international $
1990	7580.77522728234
1991	7832.01473019829
1992	8233.04869262953
1993	8549.49645526606
1994	8779.33501004988
1995	9077.37380410781
1996	9487.07494955087
1997	9901.88944433205
1998	10393.2726280321
1999	10529.9180390327
2000	11282.2507780866
2001	11568.1726632446
2002	11673.6640121848
2003	12276.2200783764
2004	12727.7160397837
2005	12877.4829614437
2006	13441.2059581538
2007	14146.3984191626
2008	14854.6433831287
2009	15306.3880106332
2010	15938.4192085871
2011	16561.7709831855
2012	17093.3209357591
2013	17628.8293775411
2014	18255.8699634331
2015	18879.4948531014
2016	19590.6092423293
2017	20319.4911105864
2018	21074.8130379266