Year | Value | 2022 | 91.881 | 2021 | 91.672 | 2020 | 91.453 | 2019 | 91.223 | 2018 | 90.981 | 2017 | 90.727 | 2016 | 90.46 | 2015 | 90.179 | 2014 | 89.884 | 2013 | 89.574 | 2012 | 89.249 | 2011 | 88.906 | 2010 | 88.547 | 2009 | 88.178 | 2008 | 87.8 | 2007 | 87.409 | 2006 | 87.009 | 2005 | 86.598 | 2004 | 86.177 | 2003 | 85.743 | 2002 | 85.299 | 2001 | 84.843 | 2000 | 84.216 | 1999 | 83.448 | 1998 | 82.893 | 1997 | 82.779 | 1996 | 82.825 | 1995 | 82.893 | 1994 | 82.482 | 1993 | 81.857 | 1992 | 81.528 | 1991 | 81.13 | 1990 | 80.947 | 1989 | 80.891 | 1988 | 80.836 | 1987 | 80.78 | 1986 | 80.725 | 1985 | 80.669 | 1984 | 80.613 | 1983 | 80.557 | 1982 | 80.501 | 1981 | 80.444 | 1980 | 80.042 | 1979 | 79.513 | 1978 | 78.975 | 1977 | 78.426 | 1976 | 77.867 | 1975 | 77.297 | 1974 | 76.717 | 1973 | 76.127 | 1972 | 75.528 | 1971 | 74.916 | 1970 | 74.374 | 1969 | 73.902 | 1968 | 73.425 | 1967 | 72.941 | 1966 | 72.452 | 1965 | 71.958 | 1964 | 71.459 | 1963 | 70.953 | 1962 | 70.443 | 1961 | 69.927 | 1960 | 69.556 |
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