Year	Percent
2000-01-01	24.500
2001-01-01	24.025
2002-01-01	21.725
2003-01-01	21.175
2004-01-01	21.725
2005-01-01	22.525
2006-01-01	24.000
2007-01-01	25.850
2008-01-01	27.375
2009-01-01	26.775
2010-01-01	26.400
2011-01-01	24.900
2012-01-01	24.675
2013-01-01	24.200
2014-01-01	25.800
2015-01-01	26.000
2016-01-01	28.425
2017-01-01	29.625