Year | Value | 2022 | 47.169342582278 | 2021 | 47.235005350077 | 2020 | 47.31198900587 | 2019 | 47.397769798964 | 2018 | 47.485154110739 | 2017 | 47.564496044449 | 2016 | 47.632794793663 | 2015 | 47.694172848755 | 2014 | 47.74660745335 | 2013 | 47.791435616642 | 2012 | 47.831430830282 | 2011 | 47.868493293178 | 2010 | 47.903936661393 | 2009 | 47.935818155899 | 2008 | 47.964309313956 | 2007 | 47.991863200051 | 2006 | 48.017847012271 | 2005 | 48.042797391921 | 2004 | 48.066261867517 | 2003 | 48.08789563439 | 2002 | 48.108253869389 | 2001 | 48.127686657893 | 2000 | 48.146093603839 | 1999 | 48.165449074372 | 1998 | 48.187485172663 | 1997 | 48.212669815652 | 1996 | 48.241526292116 | 1995 | 48.274077874798 | 1994 | 48.310425983929 | 1993 | 48.346276574293 | 1992 | 48.376653124359 | 1991 | 48.403554611634 | 1990 | 48.430515924257 | 1989 | 48.458406795049 | 1988 | 48.486970931516 | 1987 | 48.515264177862 | 1986 | 48.541141857844 | 1985 | 48.563403056532 | 1984 | 48.581086026836 | 1983 | 48.595413341574 | 1982 | 48.608103248915 | 1981 | 48.62122232466 | 1980 | 48.636861936036 | 1979 | 48.661048168661 | 1978 | 48.695691507262 | 1977 | 48.729173930469 | 1976 | 48.758929115339 | 1975 | 48.788685538681 | 1974 | 48.820493250142 | 1973 | 48.854947767931 | 1972 | 48.889149662942 | 1971 | 48.922077427249 | 1970 | 48.952648268441 | 1969 | 48.973092012732 | 1968 | 48.996826842352 | 1967 | 49.042245711657 | 1966 | 49.104393092872 | 1965 | 49.17567182863 | 1964 | 49.249271716967 | 1963 | 49.319805715072 | 1962 | 49.38312735484 | 1961 | 49.436387556396 | 1960 | 49.489444718808 |
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