Year	Percent of GDP
2004-01-01	16.3574
2005-01-01	18.1578
2006-01-01	19.3609
2007-01-01	19.0874
2008-01-01	19.8311
2009-01-01	21.0387
2010-01-01	22.3361
2011-01-01	20.8997
2012-01-01	22.1130
2013-01-01	26.1725
2014-01-01	26.2736
2015-01-01	26.3860
2016-01-01	26.2970