Year Percent of GDP 2004-01-01 3.4696 2005-01-01 5.1941 2006-01-01 5.4680 2007-01-01 5.5910 2008-01-01 6.6924 2009-01-01 6.4579 2010-01-01 5.8289 2011-01-01 6.2212 2012-01-01 5.9038 2013-01-01 4.9962 2014-01-01 4.9888 2015-01-01 3.9800 2016-01-01 4.0993 2017-01-01 7.3452