Year	Percent
1996-01-01	67.922400000000000
1997-01-01	70.944300000000000
1998-01-01	71.984400000000000
1999-01-01	61.538500000000000
2000-01-01	60.849300000000000
2001-01-01	60.864900000000000
2002-01-01	63.916500000000000
2003-01-01	61.569700000000000
2004-01-01	62.226000000000006
2005-01-01	56.476000000000006
2006-01-01	48.402300000000000
2007-01-01	49.380600000000000
2008-01-01	49.595600000000000
2009-01-01	48.889700000000000
2010-01-01	45.933800000000000
2011-01-01	49.871200000000000
2012-01-01	44.665600000000000
2013-01-01	43.336600000000000
2014-01-01	42.776000000000000