Year Percent of GDP 2004-01-01 31.5862 2005-01-01 34.0534 2006-01-01 35.3706 2007-01-01 40.5444 2008-01-01 48.9694 2009-01-01 47.2746 2010-01-01 40.1843 2011-01-01 36.3072 2012-01-01 33.7733 2013-01-01 32.1374 2014-01-01 34.3046 2015-01-01 32.7195 2016-01-01 32.7017 2017-01-01 33.6094