Year	Percent of GDP
2004-01-01	16.2119
2005-01-01	16.9169
2006-01-01	20.1099
2007-01-01	17.9839
2008-01-01	18.4811
2009-01-01	19.7697
2010-01-01	20.9683
2011-01-01	18.5243
2012-01-01	17.7792
2013-01-01	17.0097
2014-01-01	17.0986
2015-01-01	16.6824
2016-01-01	16.9338