Year Percent of GDP 2004-01-01 39.2858 2005-01-01 45.0958 2006-01-01 39.6430 2007-01-01 44.4854 2008-01-01 42.8838 2009-01-01 42.1097 2010-01-01 40.1777 2011-01-01 37.4039 2012-01-01 37.2179 2013-01-01 39.5286 2014-01-01 40.0642 2015-01-01 51.7675