Year	Percent
2006-01-01	3.3582099999999997
2007-01-01	3.1122000000000000
2008-01-01	3.0576800000000000
2009-01-01	2.8097100000000000
2010-01-01	3.0731400000000000
2011-01-01	2.9867900000000000
2012-01-01	2.7100299999999997
2013-01-01	2.6260500000000000
2014-01-01	2.5329300000000000
2015-01-01	2.3080400000000000
2016-01-01	2.1528400000000003