Year	Percent
2003-01-01	18.175
2004-01-01	19.725
2005-01-01	20.275
2006-01-01	21.350
2007-01-01	18.850
2008-01-01	18.300
2009-01-01	22.975
2010-01-01	22.575
2011-01-01	21.975
2012-01-01	23.625
2013-01-01	24.050
2014-01-01	24.225
2015-01-01	24.675
2016-01-01	24.600
2017-01-01	22.300