Year | Value | 2022 | 43.831 | 2021 | 43.372 | 2020 | 42.923 | 2019 | 42.484 | 2018 | 42.055 | 2017 | 41.636 | 2016 | 41.228 | 2015 | 40.829 | 2014 | 40.432 | 2013 | 40.036 | 2012 | 39.642 | 2011 | 39.248 | 2010 | 38.856 | 2009 | 38.466 | 2008 | 38.077 | 2007 | 37.689 | 2006 | 37.303 | 2005 | 36.919 | 2004 | 36.596 | 2003 | 36.352 | 2002 | 36.109 | 2001 | 35.867 | 2000 | 35.626 | 1999 | 35.384 | 1998 | 35.144 | 1997 | 34.905 | 1996 | 34.667 | 1995 | 34.429 | 1994 | 34.192 | 1993 | 33.955 | 1992 | 33.72 | 1991 | 33.485 | 1990 | 33.252 | 1989 | 33.019 | 1988 | 32.787 | 1987 | 32.555 | 1986 | 32.325 | 1985 | 31.997 | 1984 | 31.555 | 1983 | 31.115 | 1982 | 30.68 | 1981 | 30.248 | 1980 | 29.819 | 1979 | 29.394 | 1978 | 28.972 | 1977 | 28.554 | 1976 | 28.14 | 1975 | 27.729 | 1974 | 27.137 | 1973 | 26.321 | 1972 | 25.522 | 1971 | 24.737 | 1970 | 23.969 | 1969 | 23.218 | 1968 | 22.484 | 1967 | 21.765 | 1966 | 21.064 | 1965 | 20.379 | 1964 | 19.712 | 1963 | 19.06 | 1962 | 18.467 | 1961 | 17.903 | 1960 | 17.352 |
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