Year Percent of GDP 2004-01-01 23.9140 2005-01-01 1.6856 2006-01-01 2.2503 2007-01-01 2.7314 2008-01-01 3.0604 2009-01-01 2.9708 2010-01-01 3.9434 2011-01-01 3.2615 2012-01-01 3.1275 2013-01-01 2.7927 2014-01-01 2.9371 2015-01-01 2.9526