Year Percent of GDP 2004-01-01 20.1893 2005-01-01 28.5334 2006-01-01 23.3545 2007-01-01 23.9562 2008-01-01 20.1730 2009-01-01 19.1389 2010-01-01 16.8993 2011-01-01 14.3897 2012-01-01 13.6124 2013-01-01 14.1180 2014-01-01 15.1796