Year	Percent
2005-01-01	25.700
2006-01-01	25.300
2007-01-01	25.000
2008-01-01	23.400
2009-01-01	22.900
2010-01-01	24.725
2011-01-01	23.725
2012-01-01	23.300
2013-01-01	22.925
2014-01-01	21.950
2015-01-01	21.375
2016-01-01	20.500
2017-01-01	20.650