Year	Percent of GDP
2007-01-01	16.7883
2008-01-01	15.9007
2009-01-01	17.3011
2010-01-01	15.3500
2011-01-01	16.3002
2012-01-01	17.9034
2013-01-01	19.2526
2014-01-01	20.2357
2015-01-01	22.2592
2016-01-01	22.8957