Year constant 2011 international $ 2000 43347.7891312817 2001 41866.427499672 2002 39509.2425236231 2003 42567.2927379556 2004 44734.1632093675 2005 45969.9785391604 2006 46044.2630717557 2007 45861.3014536418 2008 47603.4620678362 2009 45275.6522751584 2010 45958.1226921329 2011 49173.0613585436 2012 50283.2106706079 2013 50243.7705321805 2014 50755.4333444567 2015 51509.4722949746 2016 51099.0913013145 2017 49370.6599261362 2018 49338.4095718348