Year	Percent
2000-01-01	23.050
2001-01-01	22.750
2002-01-01	22.425
2003-01-01	22.950
2004-01-01	23.125
2005-01-01	23.325
2006-01-01	23.100
2007-01-01	22.625
2008-01-01	22.150
2009-01-01	22.125
2010-01-01	23.900
2011-01-01	24.800
2012-01-01	24.300
2013-01-01	24.300
2014-01-01	24.500
2015-01-01	24.675
2016-01-01	25.050
2017-01-01	25.150