Year	Percent
1996-01-01	57.633700000000000
1997-01-01	61.762300000000000
1998-01-01	58.853900000000000
1999-01-01	55.086200000000000
2000-01-01	53.732000000000000
2001-01-01	54.746300000000000
2002-01-01	51.594900000000000
2003-01-01	54.205000000000000
2004-01-01	50.143900000000000
2005-01-01	56.196700000000000
2006-01-01	52.608000000000004
2007-01-01	55.535600000000000
2008-01-01	49.961300000000000
2009-01-01	31.302600000000000
2010-01-01	45.610100000000000
2011-01-01	27.870300000000000
2012-01-01	20.947500000000000
2013-01-01	22.782100000000000
2014-01-01	23.286200000000000