Year	Percent
2000-01-01	28.275
2001-01-01	28.550
2002-01-01	29.375
2003-01-01	30.050
2004-01-01	29.850
2005-01-01	29.225
2006-01-01	29.925
2007-01-01	30.000
2008-01-01	29.100
2009-01-01	28.225
2010-01-01	27.875
2011-01-01	27.350
2012-01-01	26.725
2013-01-01	26.125
2014-01-01	25.350
2015-01-01	25.200
2016-01-01	24.350
2017-01-01	23.400