Year	Percent
2000-01-01	18.50
2001-01-01	22.90
2002-01-01	21.40
2003-01-01	21.40
2004-01-01	12.70
2005-01-01	10.30
2006-01-01	17.00
2007-01-01	16.70
2008-01-01	18.70
2009-01-01	18.80
2010-01-01	17.54
2011-01-01	14.01
2012-01-01	12.54
2013-01-01	13.55
2014-01-01	12.01
2015-01-01	12.32