Year Percent of GDP 2004-01-01 48.9670 2005-01-01 48.5857 2006-01-01 49.3778 2007-01-01 52.9329 2008-01-01 52.8053 2009-01-01 54.4811 2010-01-01 51.6399 2011-01-01 52.0049 2012-01-01 53.2501 2013-01-01 51.9802 2014-01-01 51.4228 2015-01-01 52.1092 2016-01-01 50.5298 2017-01-01 50.5076