Year | Value | 2022 | 59.256 | 2021 | 58.995 | 2020 | 58.748 | 2019 | 58.515 | 2018 | 58.297 | 2017 | 58.094 | 2016 | 57.905 | 2015 | 57.715 | 2014 | 57.526 | 2013 | 57.336 | 2012 | 57.147 | 2011 | 57.115 | 2010 | 57.399 | 2009 | 57.683 | 2008 | 57.966 | 2007 | 58.249 | 2006 | 58.532 | 2005 | 58.813 | 2004 | 59.094 | 2003 | 59.375 | 2002 | 59.655 | 2001 | 59.934 | 2000 | 60.213 | 1999 | 60.491 | 1998 | 60.768 | 1997 | 61.045 | 1996 | 61.32 | 1995 | 61.596 | 1994 | 61.87 | 1993 | 62.144 | 1992 | 62.417 | 1991 | 62.689 | 1990 | 62.96 | 1989 | 63.231 | 1988 | 63.5 | 1987 | 63.769 | 1986 | 64.037 | 1985 | 64.305 | 1984 | 64.57 | 1983 | 64.836 | 1982 | 65.1 | 1981 | 65.364 | 1980 | 65.391 | 1979 | 65.381 | 1978 | 65.371 | 1977 | 65.361 | 1976 | 65.351 | 1975 | 65.341 | 1974 | 65.331 | 1973 | 65.321 | 1972 | 65.311 | 1971 | 65.301 | 1970 | 65.258 | 1969 | 65.208 | 1968 | 65.159 | 1967 | 65.11 | 1966 | 65.061 | 1965 | 65.011 | 1964 | 64.962 | 1963 | 64.913 | 1962 | 64.863 | 1961 | 64.814 | 1960 | 64.72 |
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