Year	Percent
1996-01-01	65.010600000000000
1997-01-01	60.184800000000000
1998-01-01	51.333600000000000
1999-01-01	64.209500000000000
2000-01-01	59.385300000000000
2001-01-01	51.941100000000000
2002-01-01	45.363400000000000
2003-01-01	39.399900000000000
2004-01-01	43.701100000000000
2005-01-01	44.163800000000000
2006-01-01	45.751700000000000
2007-01-01	40.983300000000000
2008-01-01	43.126999999999995
2009-01-01	42.649300000000000
2010-01-01	40.231000000000000
2011-01-01	46.422300000000000
2012-01-01	42.613500000000000
2013-01-01	42.497400000000000
2014-01-01	50.195700000000000