Year constant 2010 US$ 2007 1291.69476657275 2008 1343.52103116032 2009 1232.94821276837 2010 1313.28204588977 2011 1346.37753587675 2012 1317.09915942548 2013 1345.21333895915 2014 1407.52856044335 2015 1512.78986880879 2016 1543.28504119336