Year	Percent
2001-01-01	7.5
2002-01-01	7.7
2003-01-01	7.7
2004-01-01	7.7
2005-01-01	7.7
2006-01-01	7.7
2007-01-01	7.7
2008-01-01	7.7
2009-01-01	8.5
2010-01-01	8.4
2011-01-01	8.5
2012-01-01	7.8
2013-01-01	5.6
2014-01-01	6.2
2015-01-01	7.8