Year % 1995 57.19 1996 57.89 1997 57.89 1998 57.89 1999 57.89 2000 57.89 2001 57.89 2002 57.89 2003 57.89 2005 56.86 2006 56.86 2008 56.86 2009 55.91 2010 55.91 2011 55.91 2013 55.91 2014 55.91 2015 53.9 2016 53.9 2020 54.61 2021 54.61