Year	Percent of GDP
2004-01-01	20.4489
2005-01-01	20.0240
2006-01-01	19.7074
2007-01-01	19.4085
2008-01-01	22.9437
2009-01-01	24.8385
2010-01-01	25.5509
2011-01-01	26.6658
2012-01-01	27.6286
2013-01-01	28.5177
2014-01-01	30.3835
2015-01-01	32.0662
2016-01-01	34.0213