Year | Value | 2022 | 31.264 | 2021 | 31.717 | 2020 | 32.171 | 2019 | 32.627 | 2018 | 33.084 | 2017 | 33.541 | 2016 | 33.999 | 2015 | 34.457 | 2014 | 34.915 | 2013 | 35.373 | 2012 | 35.831 | 2011 | 36.288 | 2010 | 36.744 | 2009 | 37.2 | 2008 | 37.654 | 2007 | 38.107 | 2006 | 38.559 | 2005 | 39.012 | 2004 | 39.467 | 2003 | 39.924 | 2002 | 40.383 | 2001 | 40.844 | 2000 | 41.305 | 1999 | 41.769 | 1998 | 42.234 | 1997 | 42.701 | 1996 | 43.168 | 1995 | 43.587 | 1994 | 44.004 | 1993 | 44.42 | 1992 | 44.838 | 1991 | 45.257 | 1990 | 45.676 | 1989 | 46.095 | 1988 | 46.515 | 1987 | 46.936 | 1986 | 47.358 | 1985 | 47.779 | 1984 | 48.44 | 1983 | 49.367 | 1982 | 50.293 | 1981 | 51.219 | 1980 | 52.143 | 1979 | 53.068 | 1978 | 53.99 | 1977 | 54.909 | 1976 | 55.823 | 1975 | 56.736 | 1974 | 57.643 | 1973 | 58.486 | 1972 | 59.285 | 1971 | 60.081 | 1970 | 60.871 | 1969 | 61.655 | 1968 | 62.431 | 1967 | 63.204 | 1966 | 63.969 | 1965 | 64.727 | 1964 | 65.476 | 1963 | 66.22 | 1962 | 66.955 | 1961 | 67.682 | 1960 | 68.399 |
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