Year | Value | 2022 | 0.24944303833634 | 2021 | 0.03626795076363 | 2020 | 0.40502351070299 | 2019 | 0.42233973994755 | 2018 | 0.48668335941338 | 2017 | 0.50759043304515 | 2016 | 0.56998566411525 | 2015 | 0.56050243988967 | 2014 | 0.57288517280911 | 2013 | 0.56846322650401 | 2012 | 0.55404002406456 | 2011 | 0.42483351875779 | 2010 | 0.63015764202615 | 2009 | 0.74352837147551 | 2008 | 0.8328324118477 | 2007 | 0.81025036588696 | 2006 | 0.75013366248019 | 2005 | 0.65596058931445 | 2004 | 0.62864960668352 | 2003 | 0.61247585619964 | 2002 | 0.6142982921085 | 2001 | 0.61067098594754 | 2000 | 0.61185702186305 | 1999 | 0.62795364185607 | 1998 | 0.64096360721069 | 1997 | 0.66240110733877 | 1996 | 0.6791727764759 | 1995 | 0.67473752029443 | 1994 | 0.71453066201596 | 1993 | 0.78027598540882 | 1992 | 0.83040071892368 | 1991 | 0.81503300790398 | 1990 | 0.72045432843009 | 1989 | 0.7400331025017 | 1988 | 0.69472255978616 | 1987 | 0.68036442295703 | 1986 | 0.67021109675498 | 1985 | 0.65326011662606 | 1984 | 0.65113537753798 | 1983 | 0.69648500411736 | 1982 | 0.75497952448063 | 1981 | 0.80784938361322 | 1980 | 0.8204458735808 | 1979 | 0.85559249988951 | 1978 | 0.83308437755419 | 1977 | 0.83227427507759 | 1976 | 0.85022729554909 | 1975 | 0.92233480804495 | 1974 | 0.95386077080526 | 1973 | 0.98194800861904 | 1972 | 1.026763784921 | 1971 | 1.1847861023256 | 1970 | 1.0062648184984 | 1969 | 1.0232705990965 | 1968 | 1.0212498571971 | 1967 | 1.0438844674648 | 1966 | 1.0995634274129 | 1965 | 1.1694161469665 | 1964 | 1.2205495802383 | 1963 | 1.2387172827009 | 1962 | 1.2664710760963 | 1961 | 1.253648657784 |
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