Year | Value | 2021 | 0.70825119684596 | 2020 | 0.68994649394537 | 2019 | 0.70261898056885 | 2018 | 0.59560687130386 | 2017 | 0.62658406082794 | 2016 | 0.62658406082794 | 2015 | 0.62095184455083 | 2014 | 0.61954379048155 | 2013 | 0.5280202759786 | 2012 | 0.52238805970149 | 2011 | 0.63503238524359 | 2010 | 0.71247535905379 | 2009 | 0.70261898056885 | 2008 | 0.72655589974655 | 2007 | 0.62799211489721 | 2006 | 0.71247535905379 | 2005 | 0.95747676710786 | 2004 | 0.88707406364404 | 2003 | 0.90115460433681 | 2002 | 1.0560405519572 | 2001 | 0.99971838918614 | 2000 | 0.84483244156576 | 1999 | 0.60546324978879 | 1998 | 0.50689946493945 | 1997 | 0.63362433117432 | 1996 | 0.64770487186708 | 1995 | 0.60546324978879 | 1994 | 0.59138270909603 | 1993 | 0.5632216277105 | 1992 | 0.53506054632498 | 1991 | 0.49281892424669 | 1990 | 0.49281892424669 | 1989 | 0.40833568009012 | 1988 | 0.40833568009012 | 1987 | 0.40833568009012 | 1986 | 0.40833568009012 | 1985 | 0.36609405801183 | 1984 | 0.3379329766263 | 1983 | 0.32385243593354 | 1982 | 0.25344973246973 | 1981 | 0.26753027316249 | 1980 | 0.2252886510842 | 1979 | 0.16896648831315 | 1978 | 0.16896648831315 | 1977 | 0.16896648831315 | 1976 | 0.15488594762039 | 1975 | 0.15488594762039 | 1974 | 0.12672486623486 | 1973 | 0.1126443255421 | 1972 | 0.098563784849338 | 1971 | 0.098563784849338 | 1970 | 0.098563784849338 | 1969 | 0.084483244156576 | 1968 | 0.084483244156576 | 1967 | 0.084483244156576 | 1966 | 0.084483244156576 | 1965 | 0.070402703463813 | 1964 | 0.070402703463813 | 1963 | 0.070402703463813 | 1962 | 0.070402703463813 | 1961 | 0.070402703463813 |
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