Year Percent of GDP 2004-01-01 3.6458 2005-01-01 4.0937 2006-01-01 4.7262 2007-01-01 5.5106 2008-01-01 5.5114 2009-01-01 5.4968 2010-01-01 5.4605 2011-01-01 6.0840 2012-01-01 6.7391 2013-01-01 6.9490 2014-01-01 6.2651 2015-01-01 6.9867 2016-01-01 6.5437 2017-01-01 9.8929