Year | Value | 2021 | 42.866960998885 | 2020 | 42.931948881789 | 2019 | 43.025554257707 | 2018 | 43.140893402352 | 2017 | 43.204818206193 | 2016 | 43.253882419384 | 2015 | 43.149356516489 | 2014 | 43.148833973632 | 2013 | 43.155604118008 | 2012 | 43.129403868875 | 2011 | 43.202072879871 | 2010 | 43.066397509761 | 2009 | 43.269397040043 | 2008 | 43.298531717078 | 2007 | 43.427709425403 | 2006 | 43.622429676959 | 2005 | 43.78166431109 | 2004 | 43.8720027701 | 2003 | 44.087641405263 | 2002 | 44.213148725126 | 2001 | 44.218805983284 | 2000 | 44.300312406367 | 1999 | 44.336333995491 | 1998 | 44.450891397822 | 1997 | 44.44496131828 | 1996 | 44.205390295624 | 1995 | 44.38134392785 | 1994 | 44.474737442061 | 1993 | 44.462559970773 | 1992 | 44.466681996977 | 1991 | 44.704525001344 | 1990 | 44.763405111689 | 1989 | 44.924394297543 | 1988 | 44.691593974979 | 1987 | 44.976871666678 | 1986 | 44.769180133173 | 1985 | 45.120159156244 | 1984 | 45.225490526349 | 1983 | 44.794749250032 | 1982 | 45.33948442868 | 1981 | 44.863547332055 | 1980 | 45.048933891279 | 1979 | 44.945778616225 | 1978 | 44.942012297866 | 1977 | 44.576051697323 | 1976 | 44.525834119204 | 1975 | 44.537760794007 | 1974 | 44.401545613359 | 1973 | 44.442765875398 | 1972 | 44.057345963333 | 1971 | 43.876562682104 | 1970 | 44.116560857532 | 1969 | 43.921758502411 | 1968 | 44.248172760186 | 1967 | 44.252148318454 | 1966 | 43.978671757613 | 1965 | 43.851244653136 | 1964 | 43.536547830255 | 1963 | 43.368109703647 | 1962 | 43.139410483296 | 1961 | 42.924311857019 |
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