Year	Percent of GDP
2004-01-01	18.0281
2005-01-01	18.8758
2006-01-01	20.4863
2007-01-01	23.6405
2008-01-01	24.9349
2009-01-01	26.7290
2010-01-01	27.9166
2011-01-01	29.2006
2012-01-01	31.3740
2013-01-01	32.3948
2014-01-01	33.1396
2015-01-01	34.2135
2016-01-01	35.4159
2017-01-01	38.0786