Year constant 2010 US$ 2004 9437.34080796065 2005 10396.6965885347 2006 11284.470887001 2007 12449.2777809812 2008 12946.9361963799 2009 11761.7243293193 2010 11761.6252742633 2011 12525.7887833349 2012 13271.3600164687 2013 13934.6740817943 2014 14742.9697657393 2015 14749.4072994988 2016 15282.1998030959 2017 16143.9714043405