Year	Percent
2008-01-01	6.6699600000000006
2009-01-01	6.0428800000000000
2010-01-01	6.1269100000000000
2011-01-01	7.0719600000000010
2012-01-01	9.3469699999999990
2013-01-01	9.0776800000000000
2014-01-01	10.4806000000000000
2015-01-01	8.3197600000000000
2016-01-01	8.1295800000000000