Year | Value | 2022 | 46.729 | 2021 | 46.924 | 2020 | 47.102 | 2019 | 47.265 | 2018 | 47.412 | 2017 | 47.542 | 2016 | 47.657 | 2015 | 47.755 | 2014 | 47.838 | 2013 | 47.904 | 2012 | 47.954 | 2011 | 47.988 | 2010 | 48.006 | 2009 | 48.024 | 2008 | 48.042 | 2007 | 48.06 | 2006 | 48.078 | 2005 | 48.095 | 2004 | 48.113 | 2003 | 48.131 | 2002 | 48.149 | 2001 | 48.167 | 2000 | 48.177 | 1999 | 48.185 | 1998 | 48.192 | 1997 | 48.2 | 1996 | 48.208 | 1995 | 48.217 | 1994 | 48.227 | 1993 | 48.236 | 1992 | 48.246 | 1991 | 48.255 | 1990 | 48.254 | 1989 | 48.25 | 1988 | 48.246 | 1987 | 48.243 | 1986 | 48.239 | 1985 | 48.235 | 1984 | 48.231 | 1983 | 48.227 | 1982 | 48.224 | 1981 | 48.22 | 1980 | 48.216 | 1979 | 48.212 | 1978 | 48.209 | 1977 | 48.205 | 1976 | 48.201 | 1975 | 47.597 | 1974 | 46.806 | 1973 | 46.017 | 1972 | 45.23 | 1971 | 44.444 | 1970 | 44.169 | 1969 | 44.009 | 1968 | 43.849 | 1967 | 43.689 | 1966 | 43.53 | 1965 | 43.695 | 1964 | 43.934 | 1963 | 44.174 | 1962 | 44.414 | 1961 | 44.655 | 1960 | 44.877 |
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