Year % 1995 41.48 1998 41.43 2000 41.43 2002 41.43 2003 41.72 2004 41.72 2005 41.72 2006 41.72 2008 40.99 2009 40.99 2010 40.99 2011 40.99 2012 40.91 2013 40.91 2015 40.91 2016 40.91