Year Percent of GDP 2004-01-01 4.6661 2005-01-01 6.1896 2006-01-01 8.7447 2007-01-01 15.2845 2008-01-01 8.1143 2009-01-01 10.8059 2010-01-01 11.5128 2011-01-01 11.8096 2012-01-01 11.0492 2013-01-01 9.9568