Year	Percent of GDP
2004-01-01	16.3506
2005-01-01	17.6666
2006-01-01	18.8088
2007-01-01	17.7796
2008-01-01	18.2907
2009-01-01	17.7080
2010-01-01	18.7896
2011-01-01	20.9130
2012-01-01	22.0376
2013-01-01	27.2282
2014-01-01	31.6350
2015-01-01	31.3361
2016-01-01	31.0345