Year	Percent of GDP
2007-01-01	27.4276
2008-01-01	29.6407
2009-01-01	31.0417
2010-01-01	32.2945
2011-01-01	33.2195
2012-01-01	33.5751
2013-01-01	34.1353
2014-01-01	34.8565
2015-01-01	35.7423
2016-01-01	35.6706