Year Percent of GDP 2005-01-01 2.9128 2006-01-01 2.0017 2007-01-01 3.1273 2008-01-01 3.4816 2009-01-01 2.9483 2010-01-01 2.3856 2011-01-01 2.4764 2012-01-01 2.7679 2013-01-01 3.0643 2014-01-01 3.6555 2015-01-01 3.2273 2016-01-01 2.8573