Year	constant 2011 international $
1990	4013.58409764131
1991	3892.29462828531
1992	3811.41354153713
1993	3800.09486111814
1994	3874.49812437393
1995	3962.59607141722
1996	4099.22062239146
1997	4215.59511370317
1998	4099.16764049087
1999	4133.93783177295
2000	4224.10315180311
2001	4254.63909275606
2002	4318.03680111725
2003	4440.60480169238
2004	4645.25280474599
2005	4776.0918103569
2006	4937.14270997472
2007	5174.51358655311
2008	5300.67502253707
2009	5273.81226297631
2010	5582.53314711114
2011	5689.76094098301
2012	5967.48923364606
2013	6281.83586295389
2014	6558.97337661616
2015	6847.86517354716
2016	7209.78648558956
2017	7580.84741673228
2018	7942.50985686291