Year | Value | 2022 | 47.003740267093 | 2021 | 47.017094290018 | 2020 | 47.039176698765 | 2019 | 47.065445603081 | 2018 | 47.084781931567 | 2017 | 47.097722633156 | 2016 | 47.116021542729 | 2015 | 47.143138983202 | 2014 | 47.175573328105 | 2013 | 47.16611600088 | 2012 | 47.10820964179 | 2011 | 47.043197436089 | 2010 | 46.972749125515 | 2009 | 46.899719858892 | 2008 | 46.824623978464 | 2007 | 46.746116058744 | 2006 | 46.673947034813 | 2005 | 46.60886573755 | 2004 | 46.536027837527 | 2003 | 46.458793003677 | 2002 | 46.435005249773 | 2001 | 46.474576671964 | 2000 | 46.524454347914 | 1999 | 46.568745802993 | 1998 | 46.6033699945 | 1997 | 46.637609395797 | 1996 | 46.678387624147 | 1995 | 46.716551078833 | 1994 | 46.746311910592 | 1993 | 46.780806516066 | 1992 | 46.812415638036 | 1991 | 46.82682885813 | 1990 | 46.830980429688 | 1989 | 46.832630579374 | 1988 | 46.82561307152 | 1987 | 46.806403166683 | 1986 | 46.78996785226 | 1985 | 46.776685015753 | 1984 | 46.759143339157 | 1983 | 46.736289995673 | 1982 | 46.698251837615 | 1981 | 46.650094859157 | 1980 | 46.599575618611 | 1979 | 46.572712972109 | 1978 | 46.565417601675 | 1977 | 46.550112462263 | 1976 | 46.537164946466 | 1975 | 46.529921614705 | 1974 | 46.529106025316 | 1973 | 46.530442938189 | 1972 | 46.536023023986 | 1971 | 46.547384684908 | 1970 | 46.552576792143 | 1969 | 46.669277145037 | 1968 | 46.910830753417 | 1967 | 47.160043715847 | 1966 | 47.41730742906 | 1965 | 47.534010834221 | 1964 | 47.501594814754 | 1963 | 47.470767901263 | 1962 | 47.441974830231 | 1961 | 47.411192119755 | 1960 | 47.379878819951 |
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