Year	Percent of GDP
2004-01-01	3.6103
2005-01-01	3.6377
2006-01-01	3.8702
2007-01-01	3.8858
2008-01-01	3.9654
2009-01-01	4.1336
2010-01-01	4.1528
2011-01-01	4.1618
2012-01-01	4.1714
2013-01-01	4.0918
2014-01-01	4.0432
2015-01-01	4.0631
2016-01-01	4.1839