Year Percent of GDP 2004-01-01 14.4558959511933 2005-01-01 13.5056015193770 2006-01-01 13.4962637012998 2007-01-01 14.2581699942205 2008-01-01 16.7505346663916 2009-01-01 15.7202078694323 2010-01-01 15.9628775360600 2011-01-01 18.6091644387881 2012-01-01 17.7724213410762 2013-01-01 20.0219131383719 2014-01-01 20.7831530852745 2015-01-01 20.9004493316027 2016-01-01 20.9082185128663 2017-01-01 19.8271646369164 2018-01-01 18.0081730422206 2019-01-01 17.7520528606570