Year	Percent of GDP
2004-01-01	26.7319
2005-01-01	27.9195
2006-01-01	31.0261
2007-01-01	33.8409
2008-01-01	37.1318
2009-01-01	37.5060
2010-01-01	39.9709
2011-01-01	40.2166
2012-01-01	39.3545
2013-01-01	38.4048
2014-01-01	38.4122
2015-01-01	38.7423
2016-01-01	38.8327