Year	Percent
2005-01-01	6.7
2006-01-01	6.2
2007-01-01	5.7
2008-01-01	6.0
2009-01-01	8.3
2010-01-01	8.5
2011-01-01	8.1
2012-01-01	8.1
2013-01-01	8.1
2014-01-01	7.6
2015-01-01	7.0
2016-01-01	6.5