Year Percent of GDP 2004-01-01 29.2527 2005-01-01 29.6171 2006-01-01 28.6032 2007-01-01 30.7409 2008-01-01 32.3793 2009-01-01 38.5919 2010-01-01 37.1301 2011-01-01 36.2563 2012-01-01 38.6164 2013-01-01 39.4183 2014-01-01 46.1041 2015-01-01 56.0256