Year	Percent
1999-01-01	68.050
2000-01-01	68.375
2001-01-01	68.800
2002-01-01	68.600
2003-01-01	68.050
2004-01-01	68.525
2005-01-01	68.575
2006-01-01	69.600
2007-01-01	69.250
2008-01-01	69.775
2009-01-01	67.200
2010-01-01	65.200
2011-01-01	64.725
2012-01-01	64.050
2013-01-01	63.625
2014-01-01	63.800
2015-01-01	64.225
2016-01-01	65.750
2017-01-01	64.850