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 65 1987 65 1988 65 1989 65 1990 65 1991 65 1992 65 1993 65 1994 65 1995 65 1996 65 1997 65 1998 65 1999 65 2000 70 2001 70 2002 79.375 2003 87.5 2004 87.5 2005 87.5 2006 87.5 2007 90.625 2008 90.625 2009 90.625 2010 90.625 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