Year % 1995 72.54 1996 72.25 1997 72.25 1998 72.25 1999 72.25 2000 72.25 2001 72.25 2002 72.25 2003 72.25 2004 68.87 2005 68.87 2006 68.87 2007 68.81 2008 68.57 2009 68.57 2010 68.57 2011 68.57 2012 68.57 2013 65.29 2015 65.24 2016 65.24 2017 65.24 2018 65.7 2019 65.65 2020 65.65 2021 65.65