Year Percent of GDP 2004-01-01 45.5426 2005-01-01 46.7194 2006-01-01 47.7207 2007-01-01 50.3646 2008-01-01 52.4720 2009-01-01 55.4883 2010-01-01 57.9358 2011-01-01 59.5591 2012-01-01 60.7196 2013-01-01 61.0651 2014-01-01 61.7341 2015-01-01 61.5127 2016-01-01 62.5543