Year	Percent
1996-01-01	53.710900000000000
1997-01-01	51.851100000000000
1998-01-01	54.134800000000000
1999-01-01	54.382400000000000
2000-01-01	54.185500000000000
2001-01-01	55.295400000000000
2002-01-01	59.978600000000000
2003-01-01	64.466400000000000
2004-01-01	63.073500000000000
2005-01-01	57.845600000000000
2006-01-01	54.765300000000000
2007-01-01	53.407700000000000
2008-01-01	48.256600000000000
2009-01-01	49.880800000000000
2010-01-01	48.876999999999995
2011-01-01	52.947100000000000
2012-01-01	52.624900000000000
2013-01-01	49.441100000000000
2014-01-01	50.264300000000000