Year	Percent
1996-01-01	76.089900000000000
1997-01-01	75.757600000000000
1998-01-01	64.615400000000000
1999-01-01	71.739100000000000
2000-01-01	66.060600000000000
2001-01-01	67.822100000000000
2002-01-01	62.641000000000005
2003-01-01	64.625900000000000
2004-01-01	66.812300000000000
2005-01-01	63.100600000000000
2006-01-01	64.946900000000000
2007-01-01	62.040300000000000
2008-01-01	67.697600000000000
2009-01-01	65.825700000000000
2010-01-01	65.546200000000000
2011-01-01	66.098300000000000
2012-01-01	64.561600000000000
2013-01-01	67.297700000000000
2014-01-01	64.917900000000000