Year | Value | 2022 | 8.045 | 2021 | 8.133 | 2020 | 8.218 | 2019 | 8.302 | 2018 | 8.384 | 2017 | 8.465 | 2016 | 8.543 | 2015 | 8.619 | 2014 | 8.696 | 2013 | 8.774 | 2012 | 8.852 | 2011 | 8.931 | 2010 | 9.188 | 2009 | 10.011 | 2008 | 10.897 | 2007 | 11.854 | 2006 | 12.882 | 2005 | 14.022 | 2004 | 15.36 | 2003 | 16.804 | 2002 | 18.353 | 2001 | 20.01 | 2000 | 21.351 | 1999 | 21.477 | 1998 | 21.602 | 1997 | 21.728 | 1996 | 21.855 | 1995 | 21.984 | 1994 | 22.119 | 1993 | 22.254 | 1992 | 22.39 | 1991 | 22.527 | 1990 | 22.661 | 1989 | 22.787 | 1988 | 22.912 | 1987 | 23.038 | 1986 | 23.165 | 1985 | 23.288 | 1984 | 23.397 | 1983 | 23.507 | 1982 | 23.617 | 1981 | 23.727 | 1980 | 23.825 | 1979 | 23.882 | 1978 | 23.94 | 1977 | 23.998 | 1976 | 24.056 | 1975 | 24.284 | 1974 | 25.025 | 1973 | 25.78 | 1972 | 26.548 | 1971 | 27.334 | 1970 | 28.123 | 1969 | 28.898 | 1968 | 29.684 | 1967 | 30.484 | 1966 | 31.296 | 1965 | 32.134 | 1964 | 33.028 | 1963 | 33.936 | 1962 | 34.856 | 1961 | 35.787 | 1960 | 36.728 |
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