Year	Percent
2005-01-01	17.200
2006-01-01	15.750
2007-01-01	14.250
2008-01-01	15.300
2009-01-01	20.950
2010-01-01	21.550
2011-01-01	21.550
2012-01-01	23.900
2013-01-01	24.675
2014-01-01	24.200
2015-01-01	22.975
2016-01-01	21.400
2017-01-01	19.400