Year Percent of GDP 2004-01-01 23.4639 2005-01-01 22.4484 2006-01-01 26.5436 2007-01-01 27.0465 2008-01-01 22.6428 2009-01-01 23.2762 2010-01-01 23.2387 2011-01-01 23.8659 2012-01-01 24.8681 2013-01-01 26.1453 2014-01-01 27.9684 2015-01-01 23.8496 2016-01-01 25.9109