Year Percent of GDP 2004-01-01 9.77392685109717 2005-01-01 9.87985726226351 2006-01-01 9.87695445986936 2007-01-01 9.96528985598470 2008-01-01 11.04568099689200 2009-01-01 11.31262886093930 2010-01-01 11.53220859872270 2011-01-01 11.24269693587920 2012-01-01 10.84454450287540 2013-01-01 11.73156211168700 2014-01-01 12.60875049121360 2015-01-01 13.23997119367090 2016-01-01 12.88542865122430 2017-01-01 13.52417412068250