Year	Percent
2005-01-01	54.2644180027992
2006-01-01	56.0142344997517
2007-01-01	55.5850054916119
2008-01-01	54.9701650190378
2009-01-01	55.1033072181753
2010-01-01	55.1563431624791
2011-01-01	55.4119289589294
2012-01-01	56.5856736543301
2013-01-01	56.5119178950795
2014-01-01	56.4324069243610
2015-01-01	56.0720903251159
2016-01-01	56.1022171449075
2017-01-01	55.9945820038297