Year | Value | 2021 | 45.63372328975 | 2020 | 45.63372328975 | 2019 | 45.63372328975 | 2018 | 45.633017486281 | 2017 | 45.633017486281 | 2016 | 45.633017486281 | 2015 | 45.633017486281 | 2014 | 45.884283521254 | 2013 | 45.669013463201 | 2012 | 45.677836006564 | 2011 | 45.746651844794 | 2010 | 45.631958781077 | 2009 | 45.732535775413 | 2008 | 45.667248954529 | 2007 | 45.49609161329 | 2006 | 45.529617278069 | 2005 | 45.55079138214 | 2004 | 45.57196548621 | 2003 | 45.517265717361 | 2002 | 45.605491150989 | 2001 | 45.526088260724 | 2000 | 45.790764561608 | 1999 | 45.596668607626 | 1998 | 45.579023520901 | 1997 | 45.70253912798 | 1996 | 45.781942018245 | 1995 | 45.781942018245 | 1994 | 45.870167451873 | 1993 | 45.790764561608 | 1992 | 45.614313694352 | 1991 | 45.70253912798 | 1990 | 45.914280168687 | 1989 | 45.903693116652 | 1988 | 45.894870573289 | 1987 | 45.894870573289 | 1986 | 45.891341555944 | 1985 | 45.891341555944 | 1984 | 45.887812538599 | 1983 | 45.887812538599 | 1982 | 45.887812538599 | 1981 | 45.884283521254 | 1980 | 45.884283521254 | 1979 | 45.884283521254 | 1978 | 45.880754503908 | 1977 | 45.880754503908 | 1976 | 45.880754503908 | 1975 | 45.880754503908 | 1974 | 45.880754503908 | 1973 | 45.880754503908 | 1972 | 45.880754503908 | 1971 | 45.878989995236 | 1970 | 45.878989995236 | 1969 | 45.878989995236 | 1968 | 45.878989995236 | 1967 | 45.878989995236 | 1966 | 45.878989995236 | 1965 | 45.878989995236 | 1964 | 45.877225486563 | 1963 | 45.877225486563 | 1962 | 45.877225486563 | 1961 | 45.877225486563 |
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