Year | Value | 2022 | 0.59979294017909 | 2021 | 0.60906585052268 | 2020 | 0.54660543485004 | 2019 | 0.67247726751806 | 2018 | 0.75199256871377 | 2017 | 1.0938168966116 | 2016 | 1.116382357507 | 2015 | 0.92345325228423 | 2014 | 0.97326210632171 | 2013 | 0.64396590703013 | 2012 | 0.78280053064216 | 2011 | 0.86581349399569 | 2010 | 0.97215045513474 | 2009 | 1.0760332255511 | 2008 | 0.94370627924454 | 2007 | 1.3469933611492 | 2006 | 1.4863958478655 | 2005 | 1.4268139323705 | 2004 | 1.5849466092168 | 2003 | 2.0539529876705 | 2002 | 2.1646176161126 | 2001 | 2.7425273428068 | 2000 | 2.5121556178018 | 1999 | 1.7403400453664 | 1998 | 1.024702228724 | 1997 | 0.76491664801519 | 1996 | 1.3529503702241 | 1995 | 1.9692916265765 | 1994 | 1.991168870237 | 1993 | 2.0801210712464 | 1992 | 2.68691069093 | 1991 | 2.0364570921308 | 1990 | 1.3066466691906 | 1989 | 1.5429001505268 | 1988 | 0.85410290045183 | 1987 | 0.69464222143111 | 1986 | 1.4743914807302 | 1985 | 0.73310423825888 | 1984 | 0.91225499175673 | 1983 | 1.0287298118437 | 1982 | 1.0906824555936 | 1981 | 1.4161894443585 | 1980 | 1.4452617914323 | 1979 | 1.1076564321803 | 1978 | 0.99988236678038 | 1977 | 1.0884170921795 | 1976 | 1.0920945395273 | 1975 | 1.0302077876724 | 1974 | 1.2138970280452 | 1973 | 1.0424612255276 | 1972 | 0.9530635188308 | 1971 | 0.89873780837636 | 1970 | 0.93498452012384 | 1969 | 0.87265798666243 | 1968 | 0.80486918604651 | 1967 | 0.7969465648855 | 1966 | 0.692630775105 | 1965 | 0.72264836495761 | 1964 | 0.78077101718532 | 1963 | 0.76313181367691 | 1962 | 0.71421370967742 | 1961 | 0.72655426765016 |
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