Year Percent of GDP 2009-01-01 21.7825 2010-01-01 17.4044 2011-01-01 12.3078 2012-01-01 11.9559 2013-01-01 13.3010 2014-01-01 14.1477 2015-01-01 18.0596 2016-01-01 20.1471