Year	Percent
2000-01-01	20.60
2001-01-01	16.80
2002-01-01	15.50
2003-01-01	12.10
2004-01-01	11.90
2005-01-01	11.10
2006-01-01	13.10
2007-01-01	13.60
2008-01-01	13.80
2009-01-01	16.50
2010-01-01	18.20
2011-01-01	15.90
2012-01-01	16.30
2013-01-01	15.90
2014-01-01	16.03
2015-01-01	16.70