Year	Percent
2000-01-01	6.900
2001-01-01	7.075
2002-01-01	8.425
2003-01-01	9.100
2004-01-01	8.900
2005-01-01	8.525
2006-01-01	8.550
2007-01-01	9.150
2008-01-01	13.475
2009-01-01	24.525
2010-01-01	28.175
2011-01-01	29.575
2012-01-01	30.750
2013-01-01	26.700
2014-01-01	23.425
2015-01-01	20.225
2016-01-01	16.750
2017-01-01	14.350