Year Percent of GDP 2004-01-01 48.0711 2005-01-01 48.7760 2006-01-01 50.2157 2007-01-01 53.7050 2008-01-01 59.5313 2009-01-01 62.4394 2010-01-01 60.4277 2011-01-01 61.6913 2012-01-01 61.1247 2013-01-01 62.4258 2014-01-01 63.9264 2015-01-01 65.2104 2016-01-01 63.2226