Year Percent of GDP 2004-01-01 25.4217 2005-01-01 32.1111 2006-01-01 44.5714 2007-01-01 58.4033 2008-01-01 76.3900 2009-01-01 77.0274 2010-01-01 65.8339 2011-01-01 59.7570 2012-01-01 56.4624 2013-01-01 60.4394 2014-01-01 62.3956 2015-01-01 48.4122 2016-01-01 41.3594 2017-01-01 42.1369