Year Percent 2000 27.32539 2001 26.88103 2002 26.43666 2003 25.99229 2004 25.54793 2005 25.10356 2006 24.65919 2007 24.21483 2008 23.77046 2009 23.3261 2010 22.88173 2011 22.43736 2012 21.993 2013 21.993 2014 21.993 2015 21.993 2016 21.993