Year	Percent
1996-01-01	44.302300000000000
1997-01-01	47.141000000000005
1998-01-01	46.789300000000000
1999-01-01	50.450600000000000
2000-01-01	51.438700000000000
2001-01-01	35.516000000000000
2002-01-01	56.318000000000005
2003-01-01	73.738700000000000
2004-01-01	76.172500000000000
2005-01-01	71.565600000000000
2006-01-01	63.544700000000000
2007-01-01	57.836900000000000
2008-01-01	58.246900000000000
2009-01-01	57.341400000000000
2010-01-01	61.858700000000000
2011-01-01	59.397900000000000
2012-01-01	57.663900000000000
2013-01-01	58.458999999999996
2014-01-01	61.539100000000000