Year Percent of GDP 2004-01-01 0.0513 2005-01-01 0.0966 2006-01-01 0.1490 2007-01-01 0.1864 2008-01-01 0.2505 2009-01-01 0.4037 2010-01-01 0.4541 2011-01-01 0.6252 2012-01-01 0.8439 2013-01-01 0.6699 2014-01-01 0.3945 2015-01-01 0.3992 2016-01-01 0.3931 2017-01-01 0.2423