Year | Value | 2021 | 64.485 | 2020 | 65.182 | 2019 | 65.882 | 2018 | 65.27 | 2017 | 65.094 | 2016 | 64.997 | 2015 | 64.339 | 2014 | 64.255 | 2013 | 63.962 | 2012 | 63.544 | 2011 | 63.494 | 2010 | 62.873 | 2009 | 62.734 | 2008 | 62.142 | 2007 | 61.757 | 2006 | 61.315 | 2005 | 60.57 | 2004 | 60.149 | 2003 | 59.491 | 2002 | 58.892 | 2001 | 58.57 | 2000 | 57.938 | 1999 | 57.372 | 1998 | 56.917 | 1997 | 56.223 | 1996 | 55.522 | 1995 | 54.961 | 1994 | 54.436 | 1993 | 53.906 | 1992 | 53.039 | 1991 | 52.357 | 1990 | 51.701 | 1989 | 51.107 | 1988 | 50.594 | 1987 | 50.209 | 1986 | 49.806 | 1985 | 49.638 | 1984 | 49.545 | 1983 | 49.566 | 1982 | 49.633 | 1981 | 49.727 | 1980 | 49.821 | 1979 | 49.851 | 1978 | 49.813 | 1977 | 49.757 | 1976 | 49.666 | 1975 | 49.527 | 1974 | 49.218 | 1973 | 48.825 | 1972 | 48.337 | 1971 | 47.889 | 1970 | 47.507 | 1969 | 47.016 | 1968 | 46.521 | 1967 | 46.026 | 1966 | 45.573 | 1965 | 45.222 | 1964 | 44.87 | 1963 | 44.448 | 1962 | 44.056 | 1961 | 43.636 | 1960 | 43.241 |
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