Year	Percent of GDP
2004-01-01	17.6735
2005-01-01	16.4393
2006-01-01	16.0544
2007-01-01	16.6549
2008-01-01	16.3436
2009-01-01	18.1553
2010-01-01	18.1232
2011-01-01	18.3404
2012-01-01	17.0073
2013-01-01	17.8027
2014-01-01	19.0649
2015-01-01	20.4225
2016-01-01	21.4668