Year Percent of GDP 2004-01-01 32.5410 2005-01-01 33.5972 2006-01-01 39.8307 2007-01-01 46.7695 2008-01-01 46.7715 2009-01-01 45.6863 2010-01-01 43.1471 2011-01-01 42.1503 2012-01-01 45.7471 2013-01-01 49.0050 2014-01-01 49.2499 2015-01-01 49.1775 2016-01-01 50.3092