Year Percent of GDP 2008-01-01 15.7127 2009-01-01 13.9594 2010-01-01 13.6742 2011-01-01 18.5187 2012-01-01 18.4232 2013-01-01 24.2011 2014-01-01 25.4146 2015-01-01 21.4573 2016-01-01 23.4655