Year constant 2011 international $ 2005 21113.4541299892 2006 26833.5740479977 2007 30140.8442577818 2008 29473.105112012 2009 29597.8019224023 2010 21715.6272795889 2011 22402.1598053556 2012 23988.4305610774 2013 23246.86747278 2014 22773.4878835516 2015 23455.8692355005 2016 21364.663655653 2017 19494.2397782328