Year Percent of GDP 2004-01-01 20.6828688690436 2005-01-01 19.4576793740444 2006-01-01 21.7708622902290 2007-01-01 24.7353879002154 2008-01-01 23.9526174366557 2009-01-01 23.6390289886759 2010-01-01 26.7713975347568 2011-01-01 26.5754503020893 2012-01-01 29.7924667949855 2013-01-01 28.7348420094504 2014-01-01 29.3534686178933 2015-01-01 24.9556477065308 2016-01-01 26.0996325073251 2017-01-01 22.5823312486968 2018-01-01 23.5794121269184 2019-01-01 21.6610682494899