Year Percent of GDP 2004-01-01 59.4663 2005-01-01 57.7881 2006-01-01 65.3763 2007-01-01 66.0156 2008-01-01 67.7192 2009-01-01 77.5075 2010-01-01 81.1767 2011-01-01 82.2197 2012-01-01 79.9351 2013-01-01 73.0855 2014-01-01 64.1779 2015-01-01 56.1593 2016-01-01 54.3533 2017-01-01 54.9619