Year	Percent
2005-01-01	7.375
2006-01-01	7.075
2007-01-01	6.225
2008-01-01	5.775
2009-01-01	6.825
2010-01-01	7.350
2011-01-01	7.275
2012-01-01	7.975
2013-01-01	8.500
2014-01-01	8.400
2015-01-01	8.100
2016-01-01	7.525
2017-01-01	6.775