Year Percent of GDP 2004-01-01 28.0013 2005-01-01 32.1802 2006-01-01 36.3521 2007-01-01 40.2646 2008-01-01 44.2738 2009-01-01 45.3366 2010-01-01 44.3191 2011-01-01 46.6517 2012-01-01 48.3031 2013-01-01 49.1860 2014-01-01 50.4782 2015-01-01 50.2738 2016-01-01 49.5442