Year	Percent
2000-01-01	22.475
2001-01-01	22.525
2002-01-01	22.950
2003-01-01	23.925
2004-01-01	24.100
2005-01-01	24.200
2006-01-01	24.600
2007-01-01	24.175
2008-01-01	23.150
2009-01-01	24.500
2010-01-01	25.125
2011-01-01	26.050
2012-01-01	25.725
2013-01-01	26.275
2014-01-01	33.200
2015-01-01	32.400
2016-01-01	33.125
2017-01-01	34.100