Year Percent of GDP 2003-01-01 27.8218964890671 2004-01-01 27.7313554549701 2005-01-01 29.0578835033007 2006-01-01 27.9361629140595 2007-01-01 24.5502539407275 2008-01-01 25.7878426252756 2009-01-01 22.2343666650727 2010-01-01 23.9566457809476 2011-01-01 25.0953807631484 2012-01-01 23.9233696127517 2013-01-01 22.7322991585930 2014-01-01 23.8006349584220 2015-01-01 24.9398472155926 2016-01-01 21.8057866297166 2017-01-01 22.4143881428015