Year	Percent
2000-01-01	24.300
2001-01-01	25.350
2002-01-01	26.125
2003-01-01	25.500
2004-01-01	25.900
2005-01-01	26.375
2006-01-01	23.750
2007-01-01	22.275
2008-01-01	21.625
2009-01-01	22.350
2010-01-01	23.175
2011-01-01	21.825
2012-01-01	21.600
2013-01-01	21.400
2014-01-01	20.700
2015-01-01	19.575
2016-01-01	18.150
2017-01-01	17.350