Year	constant 2011 international $
1990	1521.96386809244
1991	1640.87426268856
1992	1851.31549216807
1993	2083.95231520274
1994	2329.47458877236
1995	2556.60486044341
1996	2781.13062601201
1997	3006.91805412445
1998	3211.62321142972
1999	3428.06317190652
2000	3689.96725498637
2001	3968.77386252586
2002	4302.22687143634
2003	4704.58679981933
2004	5149.60190060825
2005	5702.8005787526
2006	6392.37388763392
2007	7264.06003553351
2008	7924.64436460666
2009	8626.53247901403
2010	9498.07974429813
2011	10355.4957126354
2012	11115.1106750721
2013	11919.6071041718
2014	12725.0890985402
2015	13534.8462367331
2016	14368.6308012738
2017	15253.993071388
2018	16186.7926058925