Year scale 1-100 1970 30.625 1971 30.625 1972 30.625 1973 30.625 1974 30.625 1975 30.625 1976 30.625 1977 30.625 1978 30.625 1979 30.625 1980 30.625 1981 30.625 1982 33.125 1983 33.125 1984 33.125 1985 33.125 1986 33.125 1987 33.125 1988 56.25 1989 56.25 1990 56.25 1991 56.25 1992 56.25 1993 56.25 1994 56.25 1995 56.25 1996 56.25 1997 56.25 1998 56.25 1999 56.25 2000 62.5 2001 62.5 2002 62.5 2003 62.5 2004 62.5 2005 62.5 2006 62.5 2007 62.5 2008 62.5 2009 62.5 2010 62.5 2011 62.5 2012 70.625 2013 70.625 2014 70.625 2015 70.625 2016 73.125 2017 73.125 2018 73.125 2019 73.125 2020 73.125 2021 79.375 2022 79.375 2023 79.375