Year | Value | 2022 | 0.15457463967708 | 2021 | 0.18046145354819 | 2020 | 0.18292916330602 | 2019 | 0.1757557590894 | 2018 | 0.17928879774661 | 2017 | 0.19288829218853 | 2016 | 0.20332949965175 | 2015 | 0.21239226381022 | 2014 | 0.22656848774408 | 2013 | 0.24156435438832 | 2012 | 0.25775686169363 | 2011 | 0.28171746213222 | 2010 | 0.33545943779717 | 2009 | 0.42311373346409 | 2008 | 0.43780476818774 | 2007 | 0.37610610726771 | 2006 | 0.35117520374422 | 2005 | 0.36135077294492 | 2004 | 0.37537077381451 | 2003 | 0.39104541978276 | 2002 | 0.40539173135226 | 2001 | 0.27168085174266 | 2000 | 0.18418126822941 | 1999 | 0.20007130422405 | 1998 | 0.15867415536458 | 1997 | 0.16387306739211 | 1996 | 0.18663259374648 | 1995 | 0.22556615768038 | 1994 | 0.27434124650984 | 1993 | 0.30045666656017 | 1992 | 0.31177014326177 | 1991 | 0.20607026799507 | 1990 | 0.042115268952781 | 1989 | 0.0011593732428355 | 1988 | 0.0417459071882 | 1987 | 0.10985951466995 | 1986 | 0.17781019287286 | 1985 | 0.24534650013645 | 1984 | 0.30129415689048 | 1983 | 0.33701293449456 | 1982 | 0.37544672438102 | 1981 | 0.43639237474074 | 1980 | 0.49060304882843 | 1979 | 0.52648117111176 | 1978 | 0.53767865697229 | 1977 | 0.52367284176196 | 1976 | 0.51226373452292 | 1975 | 0.50269813595637 | 1974 | 0.49256563480198 | 1973 | 0.48555619766265 | 1972 | 0.4561480754491 | 1971 | 0.39400812113897 | 1970 | 0.33320155062256 | 1969 | 0.28678539278053 | 1968 | 0.2784139310604 | 1967 | 0.31147195561175 | 1966 | 0.33600206332336 | 1965 | 0.36246583618546 | 1964 | 0.40574700954405 | 1963 | 0.44444139917507 | 1962 | 0.48279061690875 | 1961 | 0.49244278577698 |
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