Year	Percent
2000-01-01	29.125
2001-01-01	29.625
2002-01-01	30.700
2003-01-01	29.550
2004-01-01	29.525
2005-01-01	29.325
2006-01-01	27.175
2007-01-01	26.775
2008-01-01	25.800
2009-01-01	25.975
2010-01-01	26.100
2011-01-01	25.250
2012-01-01	25.200
2013-01-01	24.900
2014-01-01	24.750
2015-01-01	23.325
2016-01-01	22.525
2017-01-01	21.175