Year Percent of GDP 2004-01-01 64.5701 2005-01-01 66.7454 2006-01-01 72.4007 2007-01-01 77.0398 2008-01-01 83.0345 2009-01-01 82.7905 2010-01-01 78.0164 2011-01-01 79.7785 2012-01-01 79.8415 2013-01-01 80.7838 2014-01-01 84.1209 2015-01-01 86.1067 2016-01-01 86.9752