Year | Value | 2022 | 0.68058286829853 | 2021 | 0.60059153283947 | 2020 | 0.72270391288293 | 2019 | 1.0137222634551 | 2018 | 1.1616451599604 | 2017 | 1.3474450595626 | 2016 | 1.2564539851031 | 2015 | 1.0574546855167 | 2014 | 0.99221972859188 | 2013 | 0.8473486522463 | 2012 | 0.73976327243486 | 2011 | 0.75515013366518 | 2010 | 0.85252462876531 | 2009 | 0.85190441293668 | 2008 | 0.77903329077013 | 2007 | 0.74155251462545 | 2006 | 0.56248390648189 | 2005 | 0.39994276280728 | 2004 | 0.39329899135766 | 2003 | 0.37209294279908 | 2002 | 0.32543806770373 | 2001 | 0.26847052795423 | 2000 | 0.16057548457531 | 1999 | 0.077927150870302 | 1998 | 0.055512122212331 | 1997 | 0.057262203422979 | 1996 | 0.15914708058287 | 1995 | 0.52470394155373 | 1994 | 0.71070546161965 | 1993 | 0.58083881430214 | 1992 | 0.58652992876103 | 1991 | 0.68164311760753 | 1990 | 0.77260267566117 | 1989 | 0.66718292068369 | 1988 | 0.45959836977366 | 1987 | 0.33367889142739 | 1986 | 0.23256888459452 | 1985 | 0.16517061863382 | 1984 | 0.090869614725035 | 1983 | 0.045273604653033 | 1982 | 0.057191722264335 | 1981 | 0.11992039935764 | 1980 | 0.20299679180477 | 1979 | 0.21822324745441 | 1978 | 0.29114557570821 | 1977 | 0.35515769985784 | 1976 | 0.36368609936884 | 1975 | 0.3972757346008 | 1974 | 0.29016481613414 | 1973 | 0.17236407965285 | 1972 | 0.29550037858387 | 1971 | 0.68809559070623 | 1970 | 0.93348492181065 | 1969 | 0.70274581108564 | 1968 | 0.56199674868856 | 1967 | 0.76722809909054 | 1966 | 0.95156637750885 | 1965 | 0.94184554883576 | 1964 | 0.74711716460648 | 1963 | 0.56363378444205 | 1962 | 0.55153490392046 | 1961 | 0.4710813772637 |
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