Year	Percent
2000-01-01	30.050
2001-01-01	31.075
2002-01-01	31.800
2003-01-01	31.000
2004-01-01	31.100
2005-01-01	31.950
2006-01-01	28.875
2007-01-01	28.025
2008-01-01	27.425
2009-01-01	28.200
2010-01-01	29.125
2011-01-01	27.875
2012-01-01	27.325
2013-01-01	27.100
2014-01-01	26.350
2015-01-01	25.550
2016-01-01	24.275
2017-01-01	23.125