Year	Percent
1996-01-01	76.397300000000000
1997-01-01	73.491000000000000
1998-01-01	69.035200000000000
1999-01-01	69.600400000000000
2000-01-01	63.969700000000000
2001-01-01	65.108100000000000
2002-01-01	67.740900000000000
2003-01-01	62.516600000000000
2004-01-01	51.803700000000000
2005-01-01	50.744800000000000
2006-01-01	46.368900000000000
2007-01-01	44.550200000000000
2008-01-01	48.213000000000000
2009-01-01	45.157600000000000
2010-01-01	44.265900000000000
2011-01-01	49.975700000000000
2012-01-01	57.038999999999994
2013-01-01	61.976300000000000
2014-01-01	56.231500000000000