Year	Percent of GDP
2004-01-01	12.4470
2005-01-01	13.4065
2006-01-01	15.5414
2007-01-01	16.3652
2008-01-01	17.7343
2009-01-01	18.6657
2010-01-01	20.6532
2011-01-01	20.9272
2012-01-01	20.7949
2013-01-01	20.4767
2014-01-01	20.4596
2015-01-01	20.4811
2016-01-01	20.1714