Year	constant 2011 international $
1995	3104.31778072422
1996	3061.90498974627
1997	3104.24504690221
1998	2891.92662251029
1999	2799.13485145785
2000	2852.44593612434
2001	3171.93849084777
2002	3430.94809600008
2003	3845.21192587053
2004	4174.96653316198
2005	4456.94723045026
2006	4673.00245961363
2007	4727.47976260936
2008	5117.10454895278
2009	4648.46692675491
2010	5073.20256620372
2011	5356.79182179873
2012	5454.34062854979
2013	5955.56473471221
2014	6212.03716364337
2015	6031.94036483643
2016	6291.59892004598
2017	6602.5389117622
2018	6833.10797929051