Year Percent of GDP 2004-01-01 25.1859678692837 2005-01-01 21.3395624467648 2006-01-01 21.4205529560750 2007-01-01 18.6753184520946 2008-01-01 17.9012251792894 2009-01-01 14.0686164635219 2010-01-01 14.0428103073336 2011-01-01 14.0604632944698 2012-01-01 13.4418931970141 2013-01-01 14.8849049285791 2014-01-01 14.7301588224930 2015-01-01 15.1394738108477 2016-01-01 16.0483745739683 2017-01-01 17.1439622896803 2018-01-01 17.9583046693757 2019-01-01 19.5796031984847