Year Percent of GDP 2004-01-01 2.2650 2005-01-01 2.3315 2006-01-01 2.4322 2007-01-01 2.6329 2008-01-01 3.9115 2009-01-01 4.0777 2010-01-01 4.7999 2011-01-01 5.4774 2012-01-01 5.3066 2013-01-01 6.1175 2014-01-01 6.8388 2015-01-01 7.0251 2016-01-01 6.5625