Year	Percent of GDP
2004-01-01	8.2964
2005-01-01	8.8547
2006-01-01	9.5447
2007-01-01	10.9301
2008-01-01	8.7586
2009-01-01	13.2565
2010-01-01	14.8087
2011-01-01	14.6814
2012-01-01	16.4638
2013-01-01	17.6859
2014-01-01	19.3906
2015-01-01	21.6300
2016-01-01	20.6926
2017-01-01	20.6852