Year constant 2010 US$ 2005 7094.17003161187 2006 7127.74078478704 2007 7350.32183453039 2008 7296.6455395123 2009 6895.63139829141 2010 6967.61904761905 2011 7193.13354416566 2012 7848.01167249129 2013 7822.54216787837 2014 8113.64740765885 2015 8501.28403534994 2016 9117.17689921352 2017 9225.17520021415