Year % 1995 66.5 1996 66.99 1997 66.99 1998 66.99 1999 66.99 2000 66.99 2001 66.99 2002 66.5 2003 66.5 2004 66.5 2005 66.5 2006 66.5 2007 66.5 2008 65.93 2009 65.93 2010 65.93 2011 65.93 2012 65.93 2013 65.43 2014 65.43 2015 65.43 2016 65.43 2017 65.82 2018 65.82 2019 65.82 2020 65.82 2021 65.82