Year Percent of GDP 2004-01-01 87.8440 2005-01-01 93.4667 2006-01-01 88.1513 2007-01-01 92.1466 2008-01-01 92.1778 2009-01-01 87.8315 2010-01-01 77.4988 2011-01-01 73.4299 2012-01-01 72.3193 2013-01-01 66.8773 2014-01-01 69.0971 2015-01-01 57.4088