Year	Percent
2005-01-01	53.2278775697000
2006-01-01	55.0024050913434
2007-01-01	54.5164721102948
2008-01-01	53.8084584356425
2009-01-01	53.4646382906215
2010-01-01	53.4523799648394
2011-01-01	53.8295831372773
2012-01-01	54.9956778362810
2013-01-01	54.9893785429934
2014-01-01	54.9526999721858
2015-01-01	54.7158378069162
2016-01-01	54.9460326983008
2017-01-01	54.9251634032688