Year | Value | 2022 | 0.043024914421565 | 2021 | 0.11485633833138 | 2020 | 0.072674976292575 | 2019 | 0.081899351030685 | 2018 | 0.1761298207016 | 2017 | 0.15706751448887 | 2016 | 0.21264770118772 | 2015 | 0.21836744856063 | 2014 | 0.24976441886757 | 2013 | 0.24382726420657 | 2012 | 0.1475126413073 | 2011 | 0.17729984639608 | 2010 | 0.14016230482108 | 2009 | 0.23694827259877 | 2008 | 0.32113846087437 | 2007 | 0.33619268690315 | 2006 | 0.32471664918813 | 2005 | 0.35489800333397 | 2004 | 0.37580531502542 | 2003 | 0.3566200115029 | 2002 | 0.22981570055546 | 2001 | 0.13222195787743 | 2000 | 0.11979280801438 | 1999 | 0.1650056448937 | 1998 | 0.133994096851 | 1997 | 0.15050142158502 | 1996 | 0.16301577032985 | 1995 | 0.18929807973403 | 1994 | 0.24957901981941 | 1993 | 0.32515830263154 | 1992 | 0.29110263116318 | 1991 | 0.34162020107556 | 1990 | 0.33015323853161 | 1989 | 0.33464635579259 | 1988 | 0.31938548894107 | 1987 | 0.28981012359995 | 1986 | 0.27293408424549 | 1985 | 0.23629729577017 | 1984 | 0.22686947108465 | 1983 | 0.26319933066794 | 1982 | 0.33812930984018 | 1981 | 0.42423103863172 | 1980 | 0.4634082095625 | 1979 | 0.45120087559958 | 1978 | 0.4689986525994 | 1977 | 0.48956605595254 | 1976 | 0.53133269304078 | 1975 | 0.58555254238708 | 1974 | 0.60815494519775 | 1973 | 0.64650006905937 | 1972 | 0.67742215805329 | 1971 | 0.54722633019398 | 1970 | 0.56202554397235 | 1969 | 0.70226830552693 | 1968 | 0.73137066814861 | 1967 | 0.78533449320928 | 1966 | 0.81316532429152 | 1965 | 0.85181041617615 | 1964 | 0.88334144314948 | 1963 | 0.86892465471344 | 1962 | 0.85039671233058 | 1961 | 0.83787282681855 |
|