Year	Percent of GDP
2004-01-01	17.0413
2005-01-01	17.1262
2006-01-01	16.6406
2007-01-01	16.3448
2008-01-01	16.7924
2009-01-01	18.3277
2010-01-01	18.3829
2011-01-01	18.1677
2012-01-01	18.3478
2013-01-01	18.5703
2014-01-01	18.6398
2015-01-01	18.8097
2016-01-01	19.2352
2017-01-01	19.9849