Year | Value | 2022 | 56.88 | 2021 | 57.352 | 2020 | 57.802 | 2019 | 58.23 | 2018 | 58.636 | 2017 | 59.02 | 2016 | 59.382 | 2015 | 59.723 | 2014 | 60.041 | 2013 | 60.337 | 2012 | 60.612 | 2011 | 60.865 | 2010 | 61.096 | 2009 | 61.306 | 2008 | 61.494 | 2007 | 61.661 | 2006 | 61.807 | 2005 | 61.931 | 2004 | 62.034 | 2003 | 62.116 | 2002 | 62.198 | 2001 | 62.28 | 2000 | 62.361 | 1999 | 62.443 | 1998 | 62.525 | 1997 | 62.606 | 1996 | 62.688 | 1995 | 62.769 | 1994 | 62.851 | 1993 | 62.932 | 1992 | 63.013 | 1991 | 63.094 | 1990 | 63.175 | 1989 | 63.256 | 1988 | 63.455 | 1987 | 63.794 | 1986 | 64.132 | 1985 | 64.468 | 1984 | 64.802 | 1983 | 65.136 | 1982 | 65.468 | 1981 | 65.798 | 1980 | 66.126 | 1979 | 66.454 | 1978 | 66.779 | 1977 | 67.103 | 1976 | 67.425 | 1975 | 68.029 | 1974 | 68.955 | 1973 | 69.867 | 1972 | 70.762 | 1971 | 71.644 | 1970 | 72.508 | 1969 | 73.355 | 1968 | 74.185 | 1967 | 75 | 1966 | 75.748 | 1965 | 76.481 | 1964 | 77.197 | 1963 | 77.9 | 1962 | 78.582 | 1961 | 79.249 | 1960 | 79.9 |
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