Year | Value | 2022 | 0.34523421298218 | 2021 | 0.13125793713562 | 2020 | 0.22557153063707 | 2019 | 0.31579351734889 | 2018 | 0.36125614618989 | 2017 | 0.37830991927746 | 2016 | 0.4343055902683 | 2015 | 0.44585287709408 | 2014 | 0.45219167517412 | 2013 | 0.44116904072391 | 2012 | 0.37371716227528 | 2011 | 0.24289932196953 | 2010 | 0.39629505461478 | 2009 | 0.40487993990226 | 2008 | 0.41346804984035 | 2007 | 0.3230063695067 | 2006 | 0.31093898336721 | 2005 | 0.30368327704437 | 2004 | 0.29611521609065 | 2003 | 0.257347021691 | 2002 | 0.18115759403598 | 2001 | 0.13015066602635 | 2000 | 0.10879138244553 | 1999 | 0.11296259364497 | 1998 | 0.13546916894616 | 1997 | 0.17504554323568 | 1996 | 0.19820818551509 | 1995 | 0.18936786820476 | 1994 | 0.25297400029072 | 1993 | 0.34345594276803 | 1992 | 0.40788501013225 | 1991 | 0.51470925978052 | 1990 | 0.50410975180131 | 1989 | 0.5811998202865 | 1988 | 0.64022396526262 | 1987 | 0.6367830797188 | 1986 | 0.62594186576439 | 1985 | 0.60809671432318 | 1984 | 0.60060926647221 | 1983 | 0.57886691537257 | 1982 | 0.59994928204226 | 1981 | 0.65552529596296 | 1980 | 0.68419326347985 | 1979 | 0.6752673430935 | 1978 | 0.68240371372401 | 1977 | 0.69025977315593 | 1976 | 0.70780335535107 | 1975 | 0.72156351137428 | 1974 | 0.75231175366777 | 1973 | 0.78961809949401 | 1972 | 0.82457993292986 | 1971 | 0.7541709089228 | 1970 | 0.76677274329191 | 1969 | 0.87342038978451 | 1968 | 0.91349671831749 | 1967 | 0.95594270827037 | 1966 | 0.97045499216048 | 1965 | 1.1000522424179 | 1964 | 1.1421040362932 | 1963 | 1.1547717644863 | 1962 | 1.1649865150913 | 1961 | 1.1533074862963 |
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