Year Percent of GDP 2004-01-01 2.8595 2005-01-01 4.1932 2006-01-01 4.4932 2007-01-01 5.6813 2008-01-01 7.2372 2009-01-01 8.4416 2010-01-01 9.8637 2011-01-01 10.6805 2012-01-01 10.7683 2013-01-01 10.5855 2014-01-01 11.1655 2015-01-01 11.7438 2016-01-01 13.3028