Year	Percent
1999-01-01	4.575
2000-01-01	5.000
2001-01-01	5.800
2002-01-01	6.500
2003-01-01	7.475
2004-01-01	10.275
2005-01-01	11.575
2006-01-01	9.825
2007-01-01	9.200
2008-01-01	8.425
2009-01-01	11.175
2010-01-01	9.600
2011-01-01	8.825
2012-01-01	9.525
2013-01-01	9.375
2014-01-01	10.575
2015-01-01	11.100
2016-01-01	12.125
2017-01-01	10.775