Year	Percent
2000-01-01	23.525
2001-01-01	23.750
2002-01-01	24.225
2003-01-01	24.250
2004-01-01	24.000
2005-01-01	23.575
2006-01-01	24.600
2007-01-01	24.400
2008-01-01	23.725
2009-01-01	22.550
2010-01-01	21.425
2011-01-01	21.325
2012-01-01	20.875
2013-01-01	20.900
2014-01-01	20.350
2015-01-01	20.425
2016-01-01	21.025
2017-01-01	21.250