Year Percent of GDP 2009-01-01 20.4269 2010-01-01 15.8006 2011-01-01 18.2651 2012-01-01 22.1930 2013-01-01 18.4058 2014-01-01 17.8983 2015-01-01 16.6157 2016-01-01 11.7366 2017-01-01 14.8918 2018-01-01 14.9528 2019-01-01 15.4019