Year | Value | 2022 | 81.509 | 2021 | 81.242 | 2020 | 80.975 | 2019 | 80.709 | 2018 | 80.444 | 2017 | 80.18 | 2016 | 79.917 | 2015 | 79.655 | 2014 | 79.394 | 2013 | 79.135 | 2012 | 78.878 | 2011 | 78.622 | 2010 | 78.369 | 2009 | 78.117 | 2008 | 77.868 | 2007 | 77.621 | 2006 | 77.377 | 2005 | 77.13 | 2004 | 76.883 | 2003 | 76.632 | 2002 | 76.38 | 2001 | 76.127 | 2000 | 75.871 | 1999 | 75.614 | 1998 | 75.417 | 1997 | 75.25 | 1996 | 75.082 | 1995 | 74.912 | 1994 | 74.743 | 1993 | 74.572 | 1992 | 74.401 | 1991 | 74.229 | 1990 | 74.056 | 1989 | 73.95 | 1988 | 73.875 | 1987 | 73.8 | 1986 | 73.725 | 1985 | 73.65 | 1984 | 73.575 | 1983 | 73.5 | 1982 | 73.425 | 1981 | 73.352 | 1980 | 73.282 | 1979 | 73.211 | 1978 | 73.14 | 1977 | 73.068 | 1976 | 72.997 | 1975 | 72.926 | 1974 | 72.65 | 1973 | 72.256 | 1972 | 71.86 | 1971 | 71.459 | 1970 | 71.055 | 1969 | 70.648 | 1968 | 70.238 | 1967 | 69.357 | 1966 | 68.225 | 1965 | 67.071 | 1964 | 65.898 | 1963 | 64.702 | 1962 | 63.489 | 1961 | 62.607 | 1960 | 61.88 |
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