Year	Percent
2000-01-01	26.750
2001-01-01	26.500
2002-01-01	26.275
2003-01-01	26.900
2004-01-01	27.050
2005-01-01	27.375
2006-01-01	27.225
2007-01-01	26.800
2008-01-01	26.600
2009-01-01	26.700
2010-01-01	28.525
2011-01-01	29.525
2012-01-01	29.125
2013-01-01	29.200
2014-01-01	29.500
2015-01-01	29.850
2016-01-01	30.350
2017-01-01	30.625