Year Percent of GDP 2004-01-01 34.2040209507390 2005-01-01 34.8527953237387 2006-01-01 40.1781790528909 2007-01-01 45.5451880646683 2008-01-01 52.2966134427829 2009-01-01 57.9551188418930 2010-01-01 61.9293520281096 2011-01-01 65.7417298427758 2012-01-01 64.3243213988398 2013-01-01 64.1853751567821 2014-01-01 63.2864679285679 2015-01-01 61.8183158927269 2016-01-01 62.1939607382916 2017-01-01 63.0308744240350