Year	Percent
1996-01-01	48.180300000000000
1997-01-01	53.855900000000000
1998-01-01	52.427000000000000
1999-01-01	54.416400000000000
2000-01-01	55.067100000000000
2001-01-01	61.505600000000000
2002-01-01	55.929600000000000
2003-01-01	57.112900000000000
2004-01-01	60.050900000000000
2005-01-01	60.652900000000000
2006-01-01	59.515000000000000
2007-01-01	61.373999999999995
2008-01-01	61.903100000000000
2009-01-01	60.691500000000000
2010-01-01	59.342600000000000
2011-01-01	58.333700000000000
2012-01-01	55.855700000000000
2013-01-01	56.338000000000000
2014-01-01	57.173400000000000
2015-01-01	55.953200000000000
2016-01-01	55.653400000000000