Year	Percent of GDP
2004-01-01	12.9810
2005-01-01	16.1183
2006-01-01	17.6062
2007-01-01	17.7974
2008-01-01	17.3910
2009-01-01	18.2483
2010-01-01	18.2178
2011-01-01	17.6082
2012-01-01	16.0023
2013-01-01	16.4037
2014-01-01	18.1422
2015-01-01	18.1618
2016-01-01	18.9020