Year	Percent
1999-01-01	8.050
2000-01-01	8.175
2001-01-01	8.950
2002-01-01	8.725
2003-01-01	9.100
2004-01-01	8.200
2005-01-01	7.825
2006-01-01	8.125
2007-01-01	7.525
2008-01-01	7.700
2009-01-01	8.200
2010-01-01	7.850
2011-01-01	9.350
2012-01-01	9.250
2013-01-01	9.150
2014-01-01	9.325
2015-01-01	10.125
2016-01-01	9.650
2017-01-01	9.950