Year | Value | 2022 | 22.352 | 2021 | 22.456 | 2020 | 22.547 | 2019 | 22.624 | 2018 | 22.688 | 2017 | 22.739 | 2016 | 22.776 | 2015 | 22.8 | 2014 | 22.81 | 2013 | 22.82 | 2012 | 22.83 | 2011 | 22.84 | 2010 | 23.034 | 2009 | 23.229 | 2008 | 23.425 | 2007 | 23.622 | 2006 | 23.821 | 2005 | 24.02 | 2004 | 24.221 | 2003 | 24.423 | 2002 | 24.626 | 2001 | 24.83 | 2000 | 25.035 | 1999 | 25.242 | 1998 | 25.449 | 1997 | 25.658 | 1996 | 25.867 | 1995 | 26.078 | 1994 | 26.29 | 1993 | 26.503 | 1992 | 26.64 | 1991 | 26.731 | 1990 | 26.882 | 1989 | 27.024 | 1988 | 27.001 | 1987 | 27.164 | 1986 | 27.383 | 1985 | 27.289 | 1984 | 27.057 | 1983 | 26.897 | 1982 | 26.893 | 1981 | 27.011 | 1980 | 27.156 | 1979 | 27.213 | 1978 | 27.27 | 1977 | 27.326 | 1976 | 27.383 | 1975 | 27.44 | 1974 | 27.497 | 1973 | 27.554 | 1972 | 27.611 | 1971 | 27.668 | 1970 | 27.726 | 1969 | 27.789 | 1968 | 27.853 | 1967 | 27.917 | 1966 | 27.981 | 1965 | 28.045 | 1964 | 28.109 | 1963 | 28.174 | 1962 | 28.238 | 1961 | 28.303 | 1960 | 28.616 |
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