Year scale 1-100 1970 60.625 1971 60.625 1972 60.625 1973 60.625 1974 60.625 1975 60.625 1976 60.625 1977 60.625 1978 60.625 1979 60.625 1980 60.625 1981 60.625 1982 60.625 1983 60.625 1984 60.625 1985 60.625 1986 60.625 1987 60.625 1988 60.625 1989 63.75 1990 63.75 1991 66.25 1992 66.25 1993 66.25 1994 66.25 1995 66.25 1996 66.25 1997 68.75 1998 86.875 1999 86.875 2000 86.875 2001 86.875 2002 86.875 2003 86.875 2004 86.875 2005 86.875 2006 86.875 2007 86.875 2008 86.875 2009 86.875 2010 86.875 2011 86.875 2012 86.875 2013 86.875 2014 86.875 2015 86.875 2016 86.875 2017 86.875 2018 86.875 2019 86.875 2020 86.875 2021 86.875 2022 86.875 2023 86.875