Year	Percent of GDP
2004-01-01	24.3690
2005-01-01	25.0749
2006-01-01	23.7270
2007-01-01	25.3616
2008-01-01	26.4249
2009-01-01	25.6489
2010-01-01	25.7257
2011-01-01	28.0921
2012-01-01	31.4294
2013-01-01	34.4943
2014-01-01	34.7626
2015-01-01	35.1891
2016-01-01	35.2806