Year	Percent
2005-01-01	9.68604656217552
2006-01-01	8.94049740492846
2007-01-01	7.80938575839914
2008-01-01	7.45196668598380
2009-01-01	8.81893729573808
2010-01-01	9.49950186448287
2011-01-01	9.70660465690592
2012-01-01	10.49179089002650
2013-01-01	10.87526303282270
2014-01-01	10.33306793994950
2015-01-01	9.50538989530923
2016-01-01	8.75044881831541
2017-01-01	7.86745261836766