Year	Percent
2005-01-01	12.600
2006-01-01	12.200
2007-01-01	11.800
2008-01-01	12.000
2009-01-01	12.200
2010-01-01	12.775
2011-01-01	12.250
2012-01-01	12.250
2013-01-01	12.375
2014-01-01	12.400
2015-01-01	12.150
2016-01-01	11.825
2017-01-01	11.525