Year	Percent
2009-01-01	5.4287900000000000
2010-01-01	4.8850800000000000
2011-01-01	4.8377500000000000
2012-01-01	3.9393300000000004
2013-01-01	3.5750200000000000
2014-01-01	2.8359799999999997
2015-01-01	3.5127400000000000
2016-01-01	3.1089300000000000