Year	Percent
1999-01-01	7.350
2000-01-01	6.100
2001-01-01	5.625
2002-01-01	6.625
2003-01-01	7.075
2004-01-01	7.350
2005-01-01	7.375
2006-01-01	7.225
2007-01-01	6.600
2008-01-01	6.100
2009-01-01	6.775
2010-01-01	7.300
2011-01-01	6.375
2012-01-01	6.725
2013-01-01	7.375
2014-01-01	7.650
2015-01-01	7.675
2016-01-01	7.100
2017-01-01	6.250