Year	Percent
1996-01-01	50.256400000000000
1997-01-01	61.280400000000000
1998-01-01	55.190300000000000
1999-01-01	71.550000000000000
2000-01-01	73.931200000000000
2001-01-01	71.601100000000000
2002-01-01	56.214400000000000
2003-01-01	56.734700000000000
2004-01-01	53.427200000000000
2005-01-01	62.026200000000000
2006-01-01	59.373999999999995
2007-01-01	56.147900000000000
2008-01-01	57.041900000000000
2009-01-01	55.115300000000000
2010-01-01	63.922400000000000
2011-01-01	59.851600000000000
2012-01-01	52.950700000000000
2013-01-01	53.826700000000000
2014-01-01	51.332000000000000