Year	Percent of GDP
2004-01-01	15.3412009149259
2005-01-01	17.1665588715049
2006-01-01	19.0698443414439
2007-01-01	21.2088794503719
2008-01-01	20.3088736144851
2009-01-01	20.5991357758208
2010-01-01	19.1262239682747
2011-01-01	22.3784840661681
2012-01-01	19.4375220373943
2013-01-01	21.0162367047623
2014-01-01	21.3842227208829
2015-01-01	20.6451191474941
2016-01-01	21.5892042584154
2017-01-01	20.8678788191444