Year Percent of GDP 2004-01-01 47.6059 2005-01-01 52.3646 2006-01-01 56.3930 2007-01-01 56.0609 2008-01-01 62.3205 2009-01-01 62.7854 2010-01-01 64.0984 2011-01-01 66.3486 2012-01-01 70.9706 2013-01-01 68.5263 2014-01-01 68.5583 2015-01-01 66.9318 2016-01-01 64.1748