Year | Value | 2022 | 0.27194452650612 | 2021 | 0.20728859440735 | 2020 | 0.14364119721285 | 2019 | 0.11019169049105 | 2018 | 0.13264104079191 | 2017 | 0.23467053170545 | 2016 | 0.28742140168764 | 2015 | 0.32938388581851 | 2014 | 0.41356020751941 | 2013 | 0.4607237727853 | 2012 | 0.47580948668321 | 2011 | 0.46355870749913 | 2010 | 0.45749453546583 | 2009 | 0.47824639348291 | 2008 | 0.46554928450769 | 2007 | 0.42542983210063 | 2006 | 0.3837771363051 | 2005 | 0.342248594287 | 2004 | 0.29035036151858 | 2003 | 0.23845724006822 | 2002 | 0.24238105023337 | 2001 | 0.22768734188637 | 2000 | 0.2076065154133 | 1999 | 0.232116249119 | 1998 | 0.2654729624363 | 1997 | 0.2973773304264 | 1996 | 0.32803791362748 | 1995 | 0.38165533345721 | 1994 | 0.43104890282975 | 1993 | 0.48385408885829 | 1992 | 0.56190985074608 | 1991 | 0.5461720181879 | 1990 | 0.4433820739143 | 1989 | 0.36101879900354 | 1988 | 0.29068905101244 | 1987 | 0.28362673180386 | 1986 | 0.32479489590703 | 1985 | 0.41706890447956 | 1984 | 0.53434293087344 | 1983 | 0.59599132080962 | 1982 | 0.56028584394157 | 1981 | 0.42651564491223 | 1980 | 0.31107841592642 | 1979 | 0.25557902782611 | 1978 | 0.28712236956868 | 1977 | 0.27973831304398 | 1976 | 0.30144863871956 | 1975 | 0.44386307566686 | 1974 | 0.52354299577168 | 1973 | 0.56790919793904 | 1972 | 0.59519526632465 | 1971 | 0.12620370586014 | 1970 | 0.37871823791596 | 1969 | 0.058030840565496 | 1968 | 0.44897219797355 | 1967 | 0.5415502055822 | 1966 | 0.37480082643496 | 1965 | 0.33337479536966 | 1964 | 0.55631562507721 | 1963 | 0.70697746818394 | 1962 | 0.67999539982992 | 1961 | 0.70571148366375 |
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