Year Percent of GDP 2004-01-01 62.5622 2005-01-01 70.4756 2006-01-01 76.6697 2007-01-01 81.8875 2008-01-01 91.1083 2009-01-01 96.3556 2010-01-01 88.8411 2011-01-01 80.3463 2012-01-01 80.5833 2013-01-01 86.2690 2014-01-01 85.8552 2015-01-01 70.4934 2016-01-01 72.6040 2017-01-01 74.4080