Year	Percent
2000-01-01	30.175
2001-01-01	29.400
2002-01-01	28.550
2003-01-01	30.775
2004-01-01	28.500
2005-01-01	30.725
2006-01-01	31.400
2007-01-01	34.100
2008-01-01	35.950
2009-01-01	28.350
2010-01-01	25.350
2011-01-01	31.050
2012-01-01	32.250
2013-01-01	32.350
2014-01-01	33.325
2015-01-01	36.250
2016-01-01	37.475
2017-01-01	40.550