Year Percent of GDP 2004-01-01 46.5356 2005-01-01 44.7427 2006-01-01 42.0925 2007-01-01 44.8928 2008-01-01 44.1578 2009-01-01 48.4456 2010-01-01 49.8620 2011-01-01 47.2769 2012-01-01 50.2439 2013-01-01 49.4872 2014-01-01 49.6946 2015-01-01 50.5405 2016-01-01 48.1455 2017-01-01 49.5862