Year	Percent
1996-01-01	90.152000000000000
1997-01-01	81.997300000000000
1998-01-01	74.444900000000000
1999-01-01	66.440700000000000
2000-01-01	67.410900000000000
2001-01-01	69.932500000000000
2002-01-01	62.829800000000000
2003-01-01	66.379300000000000
2004-01-01	65.450000000000000
2005-01-01	65.129300000000000
2006-01-01	67.930000000000000
2007-01-01	67.903100000000000
2008-01-01	62.769900000000000
2009-01-01	59.921200000000000
2010-01-01	58.988300000000000
2011-01-01	50.965300000000000
2012-01-01	46.162900000000000
2013-01-01	42.487700000000000
2014-01-01	43.318000000000005
2015-01-01	44.802800000000000
2016-01-01	43.127400000000000