Year	Percent
2000-01-01	72.925
2001-01-01	73.525
2002-01-01	73.500
2003-01-01	75.050
2004-01-01	75.875
2005-01-01	77.600
2006-01-01	80.900
2007-01-01	80.125
2008-01-01	79.675
2009-01-01	75.650
2010-01-01	74.000
2011-01-01	74.925
2012-01-01	75.825
2013-01-01	76.100
2014-01-01	76.075
2015-01-01	78.200
2016-01-01	77.175
2017-01-01	79.225