Year | Value | 2021 | 75.59 | 2020 | 74.966 | 2019 | 76.07 | 2018 | 75.921 | 2017 | 75.917 | 2016 | 75.861 | 2015 | 75.766 | 2014 | 75.611 | 2013 | 75.487 | 2012 | 75.33 | 2011 | 75.124 | 2010 | 74.519 | 2009 | 74.334 | 2008 | 74.095 | 2007 | 73.829 | 2006 | 73.526 | 2005 | 73.269 | 2004 | 72.728 | 2003 | 72.388 | 2002 | 72.128 | 2001 | 71.774 | 2000 | 71.128 | 1999 | 70.811 | 1998 | 70.719 | 1997 | 70.207 | 1996 | 69.992 | 1995 | 69.825 | 1994 | 69.419 | 1993 | 69.082 | 1992 | 68.639 | 1991 | 68.065 | 1990 | 67.724 | 1989 | 67.166 | 1988 | 66.679 | 1987 | 66.1 | 1986 | 65.683 | 1985 | 65.085 | 1984 | 64.448 | 1983 | 63.831 | 1982 | 63.082 | 1981 | 62.145 | 1980 | 61.346 | 1979 | 60.364 | 1978 | 59.483 | 1977 | 58.685 | 1976 | 57.608 | 1975 | 56.738 | 1974 | 55.627 | 1973 | 54.497 | 1972 | 53.362 | 1971 | 52.342 | 1970 | 51.275 | 1969 | 50.347 | 1968 | 49.4 | 1967 | 48.527 | 1966 | 47.827 | 1965 | 47.368 | 1964 | 46.655 | 1963 | 46.13 | 1962 | 45.615 | 1961 | 45.04 | 1960 | 44.483 |
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