Year | Value | 2022 | 40.882 | 2021 | 41.214 | 2020 | 41.518 | 2019 | 41.792 | 2018 | 42.037 | 2017 | 42.252 | 2016 | 42.437 | 2015 | 42.592 | 2014 | 42.716 | 2013 | 42.811 | 2012 | 42.875 | 2011 | 42.908 | 2010 | 42.911 | 2009 | 42.883 | 2008 | 42.825 | 2007 | 42.736 | 2006 | 42.617 | 2005 | 42.468 | 2004 | 42.289 | 2003 | 42.079 | 2002 | 41.87 | 2001 | 41.661 | 2000 | 41.452 | 1999 | 41.243 | 1998 | 41.035 | 1997 | 40.828 | 1996 | 40.62 | 1995 | 40.413 | 1994 | 40.206 | 1993 | 40.709 | 1992 | 41.236 | 1991 | 41.766 | 1990 | 42.211 | 1989 | 42.627 | 1988 | 43.045 | 1987 | 43.464 | 1986 | 43.883 | 1985 | 44.304 | 1984 | 44.724 | 1983 | 45.147 | 1982 | 45.57 | 1981 | 45.993 | 1980 | 46.531 | 1979 | 47.111 | 1978 | 47.69 | 1977 | 48.27 | 1976 | 48.849 | 1975 | 49.431 | 1974 | 50.012 | 1973 | 50.593 | 1972 | 51.173 | 1971 | 51.754 | 1970 | 52.921 | 1969 | 54.282 | 1968 | 55.636 | 1967 | 56.984 | 1966 | 58.32 | 1965 | 59.645 | 1964 | 60.953 | 1963 | 62.25 | 1962 | 63.527 | 1961 | 64.786 | 1960 | 65.98 |
|