Year	Percent of GDP
2004-01-01	15.8134
2005-01-01	17.6734
2006-01-01	16.7511
2007-01-01	18.7874
2008-01-01	17.8522
2009-01-01	18.2280
2010-01-01	17.1173
2011-01-01	18.9103
2012-01-01	16.0865
2013-01-01	14.4122
2014-01-01	18.8876
2015-01-01	18.0919
2016-01-01	18.9299