Year Percent of GDP 2007-01-01 0.1807 2008-01-01 0.1985 2009-01-01 0.2226 2010-01-01 0.2951 2011-01-01 0.3359 2012-01-01 0.2565 2013-01-01 0.2112 2014-01-01 0.2299 2015-01-01 0.2490 2016-01-01 0.3467