Year Percent of GDP 2004-01-01 61.6772 2005-01-01 57.9878 2006-01-01 51.1989 2007-01-01 45.6345 2008-01-01 43.0793 2009-01-01 36.4141 2010-01-01 32.9382 2011-01-01 31.5968 2012-01-01 27.7855 2013-01-01 26.6159 2014-01-01 26.6330 2015-01-01 32.3867