Year scale 1-100 1970 45.625 1971 45.625 1972 45.625 1973 45.625 1974 45.625 1975 45.625 1976 45.625 1977 45.625 1978 45.625 1979 45.625 1980 45.625 1981 45.625 1982 45.625 1983 45.625 1984 45.625 1985 45.625 1986 45.625 1987 45.625 1988 45.625 1989 45.625 1990 45.625 1991 45.625 1992 45.625 1993 50.625 1994 50.625 1995 50.625 1996 50.625 1997 50.625 1998 50.625 1999 50.625 2000 50.625 2001 50.625 2002 50.625 2003 50.625 2004 50.625 2005 50.625 2006 50.625 2007 50.625 2008 50.625 2009 50.625 2010 50.625 2011 50.625 2012 50.625 2013 50.625 2014 50.625 2015 50.625 2016 50.625 2017 60 2018 60 2019 60 2020 60 2021 60 2022 60 2023 60