Year scale 1-100 1970 49.375 1971 49.375 1972 54.375 1973 54.375 1974 54.375 1975 54.375 1976 54.375 1977 54.375 1978 54.375 1979 54.375 1980 54.375 1981 54.375 1982 54.375 1983 54.375 1984 54.375 1985 54.375 1986 54.375 1987 54.375 1988 54.375 1989 54.375 1990 54.375 1991 54.375 1992 54.375 1993 54.375 1994 54.375 1995 54.375 1996 54.375 1997 54.375 1998 54.375 1999 54.375 2000 54.375 2001 54.375 2002 54.375 2003 54.375 2004 54.375 2005 54.375 2006 54.375 2007 56.875 2008 56.875 2009 56.875 2010 56.875 2011 56.875 2012 63.125 2013 63.125 2014 63.125 2015 63.125 2016 63.125 2017 63.125 2018 63.125 2019 63.125 2020 63.125 2021 66.25 2022 66.25 2023 66.25