Year Percent of GDP 2005-01-01 21.2351 2006-01-01 28.1143 2007-01-01 28.5517 2008-01-01 26.0021 2009-01-01 26.8614 2010-01-01 25.5889 2011-01-01 29.7818 2012-01-01 40.1056 2013-01-01 55.5819