Year	Percent
2003-01-01	18.600
2004-01-01	20.350
2005-01-01	21.250
2006-01-01	22.500
2007-01-01	19.500
2008-01-01	18.075
2009-01-01	21.675
2010-01-01	23.050
2011-01-01	22.650
2012-01-01	23.125
2013-01-01	24.375
2014-01-01	23.125
2015-01-01	23.325
2016-01-01	24.025
2017-01-01	21.250