Year	Percent
2005-01-01	70.625
2006-01-01	70.975
2007-01-01	71.050
2008-01-01	71.250
2009-01-01	71.300
2010-01-01	71.600
2011-01-01	72.475
2012-01-01	72.650
2013-01-01	72.975
2014-01-01	73.200
2015-01-01	73.075
2016-01-01	73.700
2017-01-01	74.000