Year scale 1-100 1970 65 1971 65 1972 65 1973 65 1974 65 1975 65 1976 65 1977 65 1978 65 1979 65 1980 65 1981 65 1982 65 1983 65 1984 65 1985 65 1986 68.125 1987 68.125 1988 68.125 1989 68.125 1990 68.125 1991 68.125 1992 68.125 1993 68.125 1994 68.125 1995 68.125 1996 68.125 1997 68.125 1998 68.125 1999 68.125 2000 68.125 2001 73.75 2002 73.75 2003 73.75 2004 85.625 2005 91.25 2006 91.25 2007 91.25 2008 91.25 2009 93.75 2010 93.75 2011 90.625 2012 90.625 2013 90.625 2014 90.625 2015 90.625 2016 90.625 2017 90.625 2018 90.625 2019 90.625 2020 90.625 2021 90.625 2022 90.625 2023 90.625