Year	Percent
2005-01-01	70.400
2006-01-01	71.100
2007-01-01	71.600
2008-01-01	73.500
2009-01-01	73.600
2010-01-01	71.300
2011-01-01	72.550
2012-01-01	73.000
2013-01-01	73.200
2014-01-01	74.075
2015-01-01	74.700
2016-01-01	75.425
2017-01-01	75.200