Year	Percent
2000-01-01	16.000
2001-01-01	17.300
2002-01-01	18.375
2003-01-01	18.050
2004-01-01	17.675
2005-01-01	17.425
2006-01-01	13.400
2007-01-01	9.075
2008-01-01	6.850
2009-01-01	7.575
2010-01-01	8.700
2011-01-01	9.100
2012-01-01	9.675
2013-01-01	10.025
2014-01-01	8.700
2015-01-01	7.125
2016-01-01	5.700
2017-01-01	4.375