Year constant 2011 international $ 2000 12350.06020677 2001 12979.5693371719 2002 13321.4187929954 2003 12778.4546521974 2004 13358.526326889 2005 14019.4461857906 2006 13880.2281464922 2007 14288.2040290311 2008 13851.2612369622 2009 13328.4795719466 2010 13630.0306038503 2011 14534.2166081906 2012 15146.6691040423 2013 14856.6257736007 2014 15548.3450841119 2015 17132.2812298022 2016 17164.1955109039 2017 16474.1935310989 2018 17202.2706384039