Year | Value | 2022 | 25.908 | 2021 | 26.004 | 2020 | 26.085 | 2019 | 26.151 | 2018 | 26.203 | 2017 | 26.239 | 2016 | 26.261 | 2015 | 26.282 | 2014 | 26.304 | 2013 | 26.326 | 2012 | 26.347 | 2011 | 26.369 | 2010 | 26.393 | 2009 | 26.419 | 2008 | 26.444 | 2007 | 26.47 | 2006 | 26.496 | 2005 | 26.522 | 2004 | 26.548 | 2003 | 26.573 | 2002 | 26.599 | 2001 | 26.625 | 2000 | 26.617 | 1999 | 26.562 | 1998 | 26.508 | 1997 | 26.454 | 1996 | 26.4 | 1995 | 26.346 | 1994 | 26.292 | 1993 | 26.238 | 1992 | 26.185 | 1991 | 26.131 | 1990 | 26.074 | 1989 | 26.014 | 1988 | 25.954 | 1987 | 25.893 | 1986 | 25.833 | 1985 | 25.773 | 1984 | 25.714 | 1983 | 25.654 | 1982 | 25.594 | 1981 | 25.534 | 1980 | 25.523 | 1979 | 25.576 | 1978 | 25.63 | 1977 | 25.684 | 1976 | 25.738 | 1975 | 25.792 | 1974 | 25.846 | 1973 | 25.9 | 1972 | 25.954 | 1971 | 26.008 | 1970 | 26.157 | 1969 | 26.439 | 1968 | 26.721 | 1967 | 27.007 | 1966 | 27.294 | 1965 | 27.583 | 1964 | 27.873 | 1963 | 28.166 | 1962 | 28.461 | 1961 | 28.757 | 1960 | 29.076 |
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