Year | Value | 2021 | 10.668563300142 | 2020 | 10.668563300142 | 2019 | 10.668563300142 | 2018 | 10.668563300142 | 2017 | 10.668563300142 | 2016 | 10.668563300142 | 2015 | 10.668563300142 | 2014 | 10.668563300142 | 2013 | 10.668563300142 | 2012 | 10.668563300142 | 2011 | 10.668563300142 | 2010 | 10.668563300142 | 2009 | 9.9573257467994 | 2008 | 9.9573257467994 | 2007 | 9.9573257467994 | 2006 | 9.9573257467994 | 2005 | 9.9573257467994 | 2004 | 9.9573257467994 | 2003 | 9.601706970128 | 2002 | 9.9573257467994 | 2001 | 10.668563300142 | 2000 | 10.668563300142 | 1999 | 9.9573257467994 | 1998 | 9.2460881934566 | 1997 | 9.601706970128 | 1996 | 9.601706970128 | 1995 | 9.9573257467994 | 1994 | 9.9573257467994 | 1993 | 9.601706970128 | 1992 | 8.8904694167852 | 1991 | 8.8904694167852 | 1990 | 8.8904694167852 | 1989 | 8.5348506401138 | 1988 | 8.1792318634424 | 1987 | 8.5348506401138 | 1986 | 8.8904694167852 | 1985 | 10.312944523471 | 1984 | 10.135135135135 | 1983 | 9.9573257467994 | 1982 | 9.601706970128 | 1981 | 9.1394025604552 | 1980 | 9.0682788051209 | 1979 | 9.0682788051209 | 1978 | 9.0682788051209 | 1977 | 9.0682788051209 | 1976 | 9.0682788051209 | 1975 | 9.0682788051209 | 1974 | 9.0682788051209 | 1973 | 8.8904694167852 | 1972 | 8.7126600284495 | 1971 | 8.7126600284495 | 1970 | 8.7126600284495 | 1969 | 8.7126600284495 | 1968 | 8.7126600284495 | 1967 | 8.7126600284495 | 1966 | 8.3570412517781 | 1965 | 8.3570412517781 | 1964 | 8.3570412517781 | 1963 | 8.3570412517781 | 1962 | 8.3570412517781 | 1961 | 8.3570412517781 |
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