Year	Percent of GDP
2004-01-01	50.1959
2005-01-01	50.4782
2006-01-01	51.5673
2007-01-01	52.8316
2008-01-01	53.7011
2009-01-01	57.9514
2010-01-01	59.7006
2011-01-01	61.2335
2012-01-01	63.1727
2013-01-01	65.2772
2014-01-01	65.4978
2015-01-01	66.3702
2016-01-01	67.4187
2017-01-01	72.5930