Year | Value | 2022 | 59.19 | 2021 | 59.225 | 2020 | 59.24 | 2019 | 59.234 | 2018 | 59.207 | 2017 | 59.159 | 2016 | 59.09 | 2015 | 59 | 2014 | 58.889 | 2013 | 58.778 | 2012 | 58.668 | 2011 | 58.556 | 2010 | 58.445 | 2009 | 58.334 | 2008 | 58.223 | 2007 | 58.111 | 2006 | 58 | 2005 | 57.888 | 2004 | 57.777 | 2003 | 57.665 | 2002 | 57.553 | 2001 | 57.441 | 2000 | 57.33 | 1999 | 57.207 | 1998 | 57.084 | 1997 | 56.962 | 1996 | 56.839 | 1995 | 56.716 | 1994 | 56.593 | 1993 | 56.47 | 1992 | 56.347 | 1991 | 56.223 | 1990 | 56.1 | 1989 | 56.416 | 1988 | 56.731 | 1987 | 57.047 | 1986 | 57.361 | 1985 | 57.675 | 1984 | 57.988 | 1983 | 58.299 | 1982 | 58.083 | 1981 | 57.866 | 1980 | 57.649 | 1979 | 57.431 | 1978 | 57.213 | 1977 | 56.995 | 1976 | 56.776 | 1975 | 56.557 | 1974 | 56.338 | 1973 | 56.119 | 1972 | 55.9 | 1971 | 56.674 | 1970 | 57.444 | 1969 | 58.21 | 1968 | 58.972 | 1967 | 59.731 | 1966 | 60.484 | 1965 | 61.233 | 1964 | 61.975 | 1963 | 62.714 | 1962 | 63.445 | 1961 | 64.171 | 1960 | 64.889 |
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