Year	Percent
2005-01-01	50.350
2006-01-01	49.550
2007-01-01	48.425
2008-01-01	47.825
2009-01-01	48.225
2010-01-01	48.725
2011-01-01	47.600
2012-01-01	49.300
2013-01-01	49.150
2014-01-01	50.075
2015-01-01	51.175
2016-01-01	50.775
2017-01-01	50.150