Year	Percent
2000-01-01	26.825
2001-01-01	25.700
2002-01-01	24.250
2003-01-01	22.950
2004-01-01	22.050
2005-01-01	21.025
2006-01-01	19.950
2007-01-01	18.800
2008-01-01	17.475
2009-01-01	16.975
2010-01-01	17.625
2011-01-01	18.200
2012-01-01	17.725
2013-01-01	17.425
2014-01-01	18.050
2015-01-01	17.850
2016-01-01	17.825
2017-01-01	17.975