Year Percent of GDP 2004-01-01 8.2260 2005-01-01 8.2800 2006-01-01 8.6163 2007-01-01 8.8789 2008-01-01 9.5591 2009-01-01 9.5279 2010-01-01 9.4718 2011-01-01 8.6540 2012-01-01 8.9135 2013-01-01 10.0313 2014-01-01 10.7416 2015-01-01 11.9568 2016-01-01 12.1927 2017-01-01 14.3361