Year	Percent
2000-01-01	27.975
2001-01-01	26.875
2002-01-01	27.050
2003-01-01	27.675
2004-01-01	28.875
2005-01-01	29.125
2006-01-01	29.950
2007-01-01	27.575
2008-01-01	27.400
2009-01-01	27.125
2010-01-01	30.575
2011-01-01	30.750
2012-01-01	29.225
2013-01-01	29.975
2014-01-01	32.300
2015-01-01	30.575
2016-01-01	30.800
2017-01-01	30.300