Year	Percent of GDP
2004-01-01	18.7672
2005-01-01	19.3952
2006-01-01	23.9488
2007-01-01	23.9857
2008-01-01	24.4912
2009-01-01	28.7355
2010-01-01	30.7152
2011-01-01	32.6303
2012-01-01	33.9377
2013-01-01	34.8417
2014-01-01	35.3325
2015-01-01	36.3747
2016-01-01	37.4948