Year Percent of GDP 2004-01-01 35.1127 2005-01-01 46.5079 2006-01-01 41.2841 2007-01-01 47.1423 2008-01-01 46.8529 2009-01-01 42.9800 2010-01-01 36.7939 2011-01-01 29.2900 2012-01-01 26.1613 2013-01-01 28.3815 2014-01-01 29.1745 2015-01-01 20.2106