Year	Percent
1996-01-01	75.000000000000000
1997-01-01	79.661000000000000
1998-01-01	70.666700000000000
1999-01-01	71.250000000000000
2000-01-01	70.212800000000000
2001-01-01	63.207500000000000
2002-01-01	66.071400000000000
2003-01-01	61.038999999999994
2004-01-01	56.557400000000000
2005-01-01	53.389800000000000
2006-01-01	56.781600000000000
2007-01-01	55.600000000000000
2008-01-01	52.129100000000000
2009-01-01	53.742900000000000
2010-01-01	60.776800000000000
2011-01-01	65.901200000000000
2012-01-01	57.041900000000000
2013-01-01	70.714300000000000
2014-01-01	58.387500000000000