Year	Percent
2007-01-01	31.4765
2008-01-01	30.4268
2009-01-01	30.1986
2010-01-01	32.8286
2011-01-01	39.0694
2012-01-01	40.8891
2013-01-01	42.6732
2014-01-01	45.5286
2015-01-01	48.1724
2016-01-01	48.8813