Year	Percent of GDP
2004-01-01	18.8338
2005-01-01	21.0022
2006-01-01	23.0311
2007-01-01	26.1105
2008-01-01	29.1162
2009-01-01	30.1619
2010-01-01	31.7563
2011-01-01	33.8277
2012-01-01	36.4998
2013-01-01	38.9335
2014-01-01	40.4573
2015-01-01	41.5752
2016-01-01	39.0365
2017-01-01	38.4076