Year Percent of GDP 2003-01-01 15.7306952321810 2004-01-01 14.6824813599065 2005-01-01 14.9414474264114 2006-01-01 15.0848889611763 2007-01-01 15.7683601655929 2008-01-01 16.0120613292413 2009-01-01 13.8499144407909 2010-01-01 14.7562839752561 2011-01-01 15.4651996367290 2012-01-01 15.1868228559087 2013-01-01 14.8787889090347 2014-01-01 14.8108975463440 2015-01-01 14.1210150190046 2016-01-01 14.7725708946333 2017-01-01 15.0652304149861