Year	constant 2011 international $
1990	8518.06360890188
1991	7743.29068755063
1992	7940.24237882413
1993	7880.28591838996
1994	8035.49282848502
1995	8270.54188313022
1996	8306.98255254245
1997	8281.84558253581
1998	8963.69714652961
1999	8293.25441388101
2000	8641.71796546742
2001	9372.4555651089
2002	10326.8171929239
2003	10901.2408419699
2004	11642.9620554802
2005	12461.4850889205
2006	13065.1657153599
2007	13446.9082333695
2008	14811.4404492691
2009	14715.2464305072
2010	14975.3726052988
2011	15183.5053278192
2012	15570.2515848517
2013	15596.4600108005
2014	16192.8609293795
2015	16662.2616933991
2016	17756.9359719081
2017	18874.1639206189
2018	19645.9295590382