Year | Value | 2022 | 47.334 | 2021 | 47.755 | 2020 | 48.164 | 2019 | 48.561 | 2018 | 48.946 | 2017 | 49.32 | 2016 | 49.681 | 2015 | 50.029 | 2014 | 50.366 | 2013 | 50.689 | 2012 | 51 | 2011 | 51.299 | 2010 | 51.597 | 2009 | 51.896 | 2008 | 52.193 | 2007 | 52.492 | 2006 | 52.79 | 2005 | 53.087 | 2004 | 53.384 | 2003 | 53.682 | 2002 | 53.995 | 2001 | 54.332 | 2000 | 54.668 | 1999 | 55.005 | 1998 | 55.341 | 1997 | 55.677 | 1996 | 56.011 | 1995 | 56.346 | 1994 | 56.68 | 1993 | 57.013 | 1992 | 57.345 | 1991 | 57.677 | 1990 | 58.008 | 1989 | 58.339 | 1988 | 58.668 | 1987 | 58.998 | 1986 | 59.326 | 1985 | 59.653 | 1984 | 59.979 | 1983 | 60.305 | 1982 | 60.63 | 1981 | 60.953 | 1980 | 61.276 | 1979 | 61.598 | 1978 | 61.919 | 1977 | 62.238 | 1976 | 62.557 | 1975 | 62.875 | 1974 | 63.191 | 1973 | 63.506 | 1972 | 63.823 | 1971 | 64.139 | 1970 | 64.455 | 1969 | 64.768 | 1968 | 65.081 | 1967 | 65.392 | 1966 | 65.702 | 1965 | 66.011 | 1964 | 66.318 | 1963 | 66.914 | 1962 | 67.576 | 1961 | 68.232 | 1960 | 68.879 |
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