Year Percent of GDP 2004-01-01 16.5534596100376 2005-01-01 15.5759555137253 2006-01-01 16.2679845175480 2007-01-01 18.6543097067927 2008-01-01 15.6114803780647 2009-01-01 19.4176901475290 2010-01-01 17.2907558479858 2011-01-01 16.2119999678686 2012-01-01 14.9076928503948 2013-01-01 14.9039194811259 2014-01-01 15.8027029461850 2015-01-01 15.4901142169321 2016-01-01 15.3667322277928 2017-01-01 15.4743132446306 2018-01-01 13.6369264050252 2019-01-01 13.8140495546232