Year | Value | 2022 | 87.811 | 2021 | 87.858 | 2020 | 87.916 | 2019 | 87.984 | 2018 | 88.062 | 2017 | 88.15 | 2016 | 88.248 | 2015 | 88.345 | 2014 | 88.441 | 2013 | 88.537 | 2012 | 88.631 | 2011 | 88.726 | 2010 | 88.819 | 2009 | 88.912 | 2008 | 89.004 | 2007 | 89.308 | 2006 | 89.807 | 2005 | 90.285 | 2004 | 90.751 | 2003 | 91.207 | 2002 | 91.641 | 2001 | 92.056 | 2000 | 92.395 | 1999 | 92.666 | 1998 | 92.927 | 1997 | 93.18 | 1996 | 93.425 | 1995 | 93.661 | 1994 | 93.89 | 1993 | 94.111 | 1992 | 94.324 | 1991 | 94.53 | 1990 | 94.712 | 1989 | 94.872 | 1988 | 95.027 | 1987 | 95.178 | 1986 | 95.325 | 1985 | 95.159 | 1984 | 94.649 | 1983 | 94.089 | 1982 | 93.474 | 1981 | 92.8 | 1980 | 92.064 | 1979 | 91.257 | 1978 | 90.378 | 1977 | 89.42 | 1976 | 88.382 | 1975 | 87.252 | 1974 | 86.032 | 1973 | 84.716 | 1972 | 83.301 | 1971 | 81.78 | 1970 | 80.155 | 1969 | 78.424 | 1968 | 76.588 | 1967 | 74.641 | 1966 | 72.593 | 1965 | 70.445 | 1964 | 68.205 | 1963 | 65.872 | 1962 | 63.462 | 1961 | 60.983 | 1960 | 58.45 |
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