Year	Percent
2005-01-01	75.100
2006-01-01	75.400
2007-01-01	75.800
2008-01-01	75.500
2009-01-01	75.200
2010-01-01	74.350
2011-01-01	74.700
2012-01-01	74.500
2013-01-01	74.175
2014-01-01	74.150
2015-01-01	74.225
2016-01-01	74.500
2017-01-01	74.450