Year Percent of GDP 2004-01-01 17.6630055593632 2005-01-01 17.5854883314773 2006-01-01 16.8543196654960 2007-01-01 17.5385613524510 2008-01-01 19.4792798736133 2009-01-01 19.9155429347038 2010-01-01 20.6160155476252 2011-01-01 20.2266163007679 2012-01-01 20.3599662335588 2013-01-01 20.6289282674135 2014-01-01 20.2181736562074 2015-01-01 20.7217883922984 2016-01-01 20.3932600601541 2017-01-01 22.0563175493110 2018-01-01 21.7276873079025 2019-01-01 21.7276873079026