Year | Value | 2021 | 65.351 | 2020 | 65.787 | 2019 | 65.474 | 2018 | 65.182 | 2017 | 65.103 | 2016 | 64.84 | 2015 | 64.701 | 2014 | 64.259 | 2013 | 63.961 | 2012 | 63.733 | 2011 | 63.526 | 2010 | 63.039 | 2009 | 62.788 | 2008 | 62.571 | 2007 | 62.034 | 2006 | 61.917 | 2005 | 61.801 | 2004 | 61.761 | 2003 | 61.797 | 2002 | 61.698 | 2001 | 61.773 | 2000 | 61.72 | 1999 | 61.672 | 1998 | 60.629 | 1997 | 61.377 | 1996 | 61.105 | 1995 | 61.049 | 1994 | 60.756 | 1993 | 60.506 | 1992 | 60.218 | 1991 | 59.908 | 1990 | 59.721 | 1989 | 59.58 | 1988 | 59.336 | 1987 | 59.213 | 1986 | 58.959 | 1985 | 58.866 | 1984 | 58.593 | 1983 | 58.368 | 1982 | 58.109 | 1981 | 57.831 | 1980 | 57.435 | 1979 | 57.003 | 1978 | 56.554 | 1977 | 56.037 | 1976 | 55.569 | 1975 | 55.039 | 1974 | 54.48 | 1973 | 53.869 | 1972 | 53.215 | 1971 | 52.579 | 1970 | 52.127 | 1969 | 51.414 | 1968 | 50.839 | 1967 | 50.135 | 1966 | 49.508 | 1965 | 48.816 | 1964 | 48.202 | 1963 | 47.599 | 1962 | 46.659 | 1961 | 46.292 | 1960 | 45.679 |
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