Year constant 2011 international $ 2000 13830.8897867274 2001 14201.6737029154 2002 14620.6741431211 2003 15017.1631062326 2004 16176.5396337768 2005 16813.3317451592 2006 18296.5447992206 2007 19611.435877749 2008 20594.5918052015 2009 20523.1977442655 2010 21747.5757688857 2011 22954.9792768451 2012 23344.914632638 2013 23585.559283505 2014 23763.657605347 2015 23908.3863913624 2016 23933.2683205393 2017 23918.3540459545 2018 23913.3085468755