Year | Value | 2022 | 37.084 | 2021 | 37.358 | 2020 | 37.619 | 2019 | 37.866 | 2018 | 38.101 | 2017 | 38.322 | 2016 | 38.529 | 2015 | 38.723 | 2014 | 38.902 | 2013 | 39.082 | 2012 | 39.262 | 2011 | 39.443 | 2010 | 39.623 | 2009 | 39.805 | 2008 | 39.96 | 2007 | 40.038 | 2006 | 40.116 | 2005 | 40.195 | 2004 | 40.273 | 2003 | 40.352 | 2002 | 40.43 | 2001 | 40.509 | 2000 | 40.588 | 1999 | 40.666 | 1998 | 40.745 | 1997 | 40.824 | 1996 | 40.903 | 1995 | 40.982 | 1994 | 41.061 | 1993 | 41.174 | 1992 | 41.321 | 1991 | 41.469 | 1990 | 41.616 | 1989 | 41.764 | 1988 | 41.912 | 1987 | 42.06 | 1986 | 42.208 | 1985 | 42.356 | 1984 | 42.505 | 1983 | 42.654 | 1982 | 42.802 | 1981 | 42.951 | 1980 | 43.1 | 1979 | 43.14 | 1978 | 43.18 | 1977 | 43.22 | 1976 | 43.26 | 1975 | 43.3 | 1974 | 43.798 | 1973 | 44.297 | 1972 | 44.796 | 1971 | 45.298 | 1970 | 45.8 | 1969 | 48.391 | 1968 | 50.988 | 1967 | 52.919 | 1966 | 53.916 | 1965 | 54.909 | 1964 | 55.898 | 1963 | 56.884 | 1962 | 57.864 | 1961 | 58.838 | 1960 | 59.805 |
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