Year	Percent
2005-01-01	5.5
2006-01-01	5.1
2007-01-01	4.7
2008-01-01	4.9
2009-01-01	6.9
2010-01-01	7.1
2011-01-01	6.8
2012-01-01	6.8
2013-01-01	6.8
2014-01-01	6.3
2015-01-01	5.8
2016-01-01	5.5