Year	constant 2011 international $
1990	5975.54699301398
1991	6060.38701001893
1992	6307.13311942584
1993	5676.24739399379
1994	5505.58290023473
1995	4000.64801014661
1996	4023.850162707
1997	4483.86955825724
1998	5177.93949848993
1999	4033.62401522643
2000	3564.31765832927
2001	3998.19943119754
2002	4053.54815664561
2003	3939.98453372863
2004	3613.02062768766
2005	2974.98383344885
2006	2674.46142459739
2007	3130.83467542023
2008	3614.22189467822
2009	4067.99228199863
2010	4050.73092170653
2011	3976.10726493654
2012	4742.33108172588
2013	5107.793991064
2014	5941.55013323172
2015	7631.20610887583
2016	6764.7232764504
2017	6068.01839452227
2018	5803.88344977429