Year	Percent
1996-01-01	40.314000000000000
1997-01-01	47.530300000000000
1998-01-01	46.945300000000000
1999-01-01	48.885700000000000
2000-01-01	50.049200000000000
2001-01-01	50.863500000000000
2002-01-01	56.483500000000000
2003-01-01	63.077200000000000
2004-01-01	60.967600000000000
2005-01-01	59.821000000000005
2006-01-01	57.926400000000000
2007-01-01	56.079700000000000
2008-01-01	54.905100000000000
2009-01-01	56.424700000000000
2010-01-01	59.494900000000000
2011-01-01	57.759800000000000
2012-01-01	59.531300000000000
2013-01-01	61.985900000000000
2014-01-01	63.359800000000000
2015-01-01	65.771700000000000
2016-01-01	65.831600000000000