Year % 1995 43.1 1996 43.1 1997 43.47 1998 43.47 1999 43.47 2000 43.47 2001 43.47 2002 43.57 2003 43.57 2004 43.57 2005 43.57 2006 43.57 2007 43.69 2008 43.69 2009 43.69 2010 43.69 2011 43.69 2012 43.77 2013 43.77 2014 43.77 2016 43.77 2018 43.83 2019 43.83 2020 43.83 2021 43.83