Year | Value | 2022 | 87.543 | 2021 | 87.299 | 2020 | 87.048 | 2019 | 86.789 | 2018 | 86.522 | 2017 | 86.248 | 2016 | 85.965 | 2015 | 85.674 | 2014 | 85.375 | 2013 | 85.066 | 2012 | 84.749 | 2011 | 84.423 | 2010 | 84.087 | 2009 | 83.742 | 2008 | 83.387 | 2007 | 83.023 | 2006 | 82.648 | 2005 | 82.262 | 2004 | 81.871 | 2003 | 81.472 | 2002 | 81.067 | 2001 | 80.655 | 2000 | 80.236 | 1999 | 79.81 | 1998 | 79.378 | 1997 | 78.938 | 1996 | 78.493 | 1995 | 78.319 | 1994 | 78.467 | 1993 | 78.614 | 1992 | 78.76 | 1991 | 78.906 | 1990 | 79.051 | 1989 | 79.196 | 1988 | 79.339 | 1987 | 79.482 | 1986 | 79.624 | 1985 | 79.804 | 1984 | 80.026 | 1983 | 80.247 | 1982 | 80.466 | 1981 | 80.683 | 1980 | 80.71 | 1979 | 80.51 | 1978 | 80.309 | 1977 | 80.106 | 1976 | 79.903 | 1975 | 79.8 | 1974 | 79.8 | 1973 | 79.8 | 1972 | 79.8 | 1971 | 79.8 | 1970 | 79.8 | 1969 | 79.8 | 1968 | 79.8 | 1967 | 79.272 | 1966 | 78.508 | 1965 | 77.723 | 1964 | 76.919 | 1963 | 76.093 | 1962 | 75.248 | 1961 | 74.383 | 1960 | 73.5 |
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