Year	Percent of GDP
2004-01-01	20.6707
2005-01-01	18.5914
2006-01-01	19.9652
2007-01-01	22.3782
2008-01-01	22.1163
2009-01-01	24.2420
2010-01-01	26.2816
2011-01-01	27.3299
2012-01-01	28.5396
2013-01-01	32.0760
2014-01-01	33.4134
2015-01-01	36.5327
2016-01-01	38.2334