Year | Value | 2022 | 88.492 | 2021 | 88.238 | 2020 | 87.977 | 2019 | 87.708 | 2018 | 87.431 | 2017 | 87.146 | 2016 | 86.852 | 2015 | 86.553 | 2014 | 86.247 | 2013 | 85.936 | 2012 | 85.62 | 2011 | 85.297 | 2010 | 85.056 | 2009 | 84.902 | 2008 | 84.746 | 2007 | 84.588 | 2006 | 84.43 | 2005 | 84.319 | 2004 | 84.258 | 2003 | 84.196 | 2002 | 84.133 | 2001 | 84.071 | 2000 | 84.026 | 1999 | 83.998 | 1998 | 83.97 | 1997 | 83.942 | 1996 | 83.914 | 1995 | 83.824 | 1994 | 83.671 | 1993 | 83.516 | 1992 | 83.361 | 1991 | 83.204 | 1990 | 83.1 | 1989 | 83.1 | 1988 | 83.1 | 1987 | 83.1 | 1986 | 83.1 | 1985 | 83.1 | 1984 | 83.1 | 1983 | 83.1 | 1982 | 83.1 | 1981 | 83.1 | 1980 | 83.087 | 1979 | 83.016 | 1978 | 82.944 | 1977 | 82.873 | 1976 | 82.802 | 1975 | 82.73 | 1974 | 82.517 | 1973 | 82.203 | 1972 | 81.886 | 1971 | 81.563 | 1970 | 81.034 | 1969 | 80.287 | 1968 | 79.519 | 1967 | 78.727 | 1966 | 77.914 | 1965 | 77.056 | 1964 | 76.153 | 1963 | 75.223 | 1962 | 74.271 | 1961 | 73.295 | 1960 | 72.49 |
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