Year | Value | 2021 | 0.59230113290291 | 2020 | 0.59230113290291 | 2019 | 0.59230113290291 | 2018 | 0.59230113290291 | 2017 | 0.59230113290291 | 2016 | 0.59230113290291 | 2015 | 0.59227676939944 | 2014 | 0.5922280423925 | 2013 | 0.59220367888902 | 2012 | 0.59300767450359 | 2011 | 0.59227676939944 | 2010 | 0.59154586429529 | 2009 | 0.59081495919113 | 2008 | 0.59008405408698 | 2007 | 0.58935314898282 | 2006 | 0.58862224387867 | 2005 | 0.58789133877452 | 2004 | 0.58716043367036 | 2003 | 0.58642952856621 | 2002 | 0.58569862346205 | 2001 | 0.5849677183579 | 2000 | 0.58423681325375 | 1999 | 0.58350590814959 | 1998 | 0.58277500304544 | 1997 | 0.58204409794128 | 1996 | 0.69827333918642 | 1995 | 0.69739537606087 | 1994 | 0.69651741293532 | 1993 | 0.69563944980977 | 1992 | 0.69476148668423 | 1991 | 0.69388352355868 | 1990 | 0.69300556043313 | 1989 | 0.69212759730758 | 1988 | 0.69124963418203 | 1987 | 0.69037167105648 | 1986 | 0.68949370793093 | 1985 | 0.68861574480539 | 1984 | 0.68773778167984 | 1983 | 0.68773778167984 | 1982 | 0.68773778167984 | 1981 | 0.68773778167984 | 1980 | 0.68773778167984 | 1979 | 0.68773778167984 | 1978 | 0.68773778167984 | 1977 | 0.68773778167984 | 1976 | 0.68773778167984 | 1975 | 0.68773778167984 | 1974 | 0.68773778167984 | 1973 | 0.68773778167984 | 1972 | 0.68773778167984 | 1971 | 0.68773778167984 | 1970 | 0.68773778167984 | 1969 | 0.68773778167984 | 1968 | 0.68773778167984 | 1967 | 0.68773778167984 | 1966 | 0.68773778167984 | 1965 | 0.68773778167984 | 1964 | 0.68773778167984 | 1963 | 0.68773778167984 | 1962 | 0.68773778167984 | 1961 | 0.68773778167984 |
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