Year	Percent
2005-01-01	5.2
2006-01-01	4.8
2007-01-01	4.4
2008-01-01	4.8
2009-01-01	7.1
2010-01-01	7.3
2011-01-01	6.7
2012-01-01	6.7
2013-01-01	6.7
2014-01-01	6.2
2015-01-01	5.7
2016-01-01	5.3