Year | Value | 2022 | 87.727 | 2021 | 87.507 | 2020 | 87.282 | 2019 | 87.052 | 2018 | 86.816 | 2017 | 86.574 | 2016 | 86.326 | 2015 | 86.071 | 2014 | 85.813 | 2013 | 85.551 | 2012 | 85.2 | 2011 | 84.755 | 2010 | 84.383 | 2009 | 84.087 | 2008 | 83.787 | 2007 | 83.482 | 2006 | 83.172 | 2005 | 82.858 | 2004 | 82.58 | 2003 | 82.338 | 2002 | 82.095 | 2001 | 81.849 | 2000 | 81.6 | 1999 | 81.476 | 1998 | 81.351 | 1997 | 81.226 | 1996 | 81.1 | 1995 | 80.902 | 1994 | 80.703 | 1993 | 80.503 | 1992 | 80.301 | 1991 | 80.033 | 1990 | 79.698 | 1989 | 79.359 | 1988 | 79.016 | 1987 | 78.668 | 1986 | 78.317 | 1985 | 77.961 | 1984 | 77.602 | 1983 | 77.237 | 1982 | 76.869 | 1981 | 76.497 | 1980 | 76.121 | 1979 | 75.74 | 1978 | 75.355 | 1977 | 74.966 | 1976 | 74.625 | 1975 | 74.389 | 1974 | 74.152 | 1973 | 73.914 | 1972 | 73.675 | 1971 | 73.433 | 1970 | 72.744 | 1969 | 71.481 | 1968 | 70.186 | 1967 | 68.853 | 1966 | 67.491 | 1965 | 66.05 | 1964 | 64.534 | 1963 | 62.983 | 1962 | 61.406 | 1961 | 59.806 | 1960 | 58.534 |
|