Year Percent of GDP 2004-01-01 36.6475 2005-01-01 35.1668 2006-01-01 36.0720 2007-01-01 36.2513 2008-01-01 33.4817 2009-01-01 33.5190 2010-01-01 32.8864 2011-01-01 32.2594 2012-01-01 33.8574 2013-01-01 34.0628 2014-01-01 33.9658 2015-01-01 35.2359 2016-01-01 38.0399