Year	Percent of GDP
2004-01-01	12.7931
2005-01-01	13.9141
2006-01-01	14.3896
2007-01-01	15.5640
2008-01-01	18.1470
2009-01-01	12.7925
2010-01-01	16.1896
2011-01-01	15.1233
2012-01-01	14.2415
2013-01-01	14.7347
2014-01-01	15.4806
2015-01-01	15.9536
2016-01-01	16.1324