Year	constant 2011 international $
1994	1988.33709639859
1995	2167.45530959171
1996	2402.65609536856
1997	2594.77728057
1998	2725.09122881295
1999	2827.20644687448
2000	3006.28398678259
2001	3324.89644905017
2002	3813.68137569403
2003	4357.67130675664
2004	4822.4948840771
2005	5600.46537372287
2006	6426.20966059967
2007	7424.9762607701
2008	8044.54440306985
2009	6810.55932848055
2010	7060.76066239563
2011	7268.98932583388
2012	7793.25207017295
2013	8169.26541028648
2014	8301.26727503945
2015	8482.36024269511
2016	8310.10355060146
2017	9063.54355854433
2018	9277.23282854524