Year Percent of GDP 2004-01-01 24.6390 2005-01-01 26.1086 2006-01-01 28.1848 2007-01-01 26.9398 2008-01-01 28.4129 2009-01-01 32.0626 2010-01-01 32.4829 2011-01-01 30.9136 2012-01-01 30.9624 2013-01-01 30.3583 2014-01-01 30.8664 2015-01-01 31.4340 2016-01-01 32.6370