Year	Percent
2000-01-01	25.050
2001-01-01	24.975
2002-01-01	25.550
2003-01-01	25.600
2004-01-01	25.075
2005-01-01	24.375
2006-01-01	23.275
2007-01-01	20.200
2008-01-01	21.425
2009-01-01	24.350
2010-01-01	26.400
2011-01-01	27.325
2012-01-01	27.625
2013-01-01	27.375
2014-01-01	27.325
2015-01-01	27.000
2016-01-01	26.925
2017-01-01	27.325