Year | Value | 2022 | 97.732 | 2021 | 97.62 | 2020 | 97.499 | 2019 | 97.368 | 2018 | 97.226 | 2017 | 97.072 | 2016 | 96.91 | 2015 | 96.739 | 2014 | 96.559 | 2013 | 96.37 | 2012 | 96.171 | 2011 | 95.961 | 2010 | 95.74 | 2009 | 95.508 | 2008 | 95.264 | 2007 | 95.007 | 2006 | 94.736 | 2005 | 94.453 | 2004 | 94.155 | 2003 | 93.975 | 2002 | 93.925 | 2001 | 93.75 | 2000 | 93.44 | 1999 | 93.115 | 1998 | 92.776 | 1997 | 92.422 | 1996 | 92.052 | 1995 | 91.664 | 1994 | 91.261 | 1993 | 90.839 | 1992 | 90.4 | 1991 | 90.4 | 1990 | 90.4 | 1989 | 90.4 | 1988 | 90.4 | 1987 | 90.4 | 1986 | 89.392 | 1985 | 88.291 | 1984 | 87.095 | 1983 | 85.792 | 1982 | 84.384 | 1981 | 82.864 | 1980 | 81.231 | 1979 | 79.475 | 1978 | 77.604 | 1977 | 75.615 | 1976 | 73.566 | 1975 | 71.484 | 1974 | 69.309 | 1973 | 67.046 | 1972 | 64.703 | 1971 | 62.281 | 1970 | 59.8 | 1969 | 58.735 | 1968 | 57.663 | 1967 | 56.581 | 1966 | 55.494 | 1965 | 54.402 | 1964 | 53.307 | 1963 | 52.206 | 1962 | 51.104 | 1961 | 50.001 | 1960 | 48.9 |
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