Year | Value | 2022 | 25.233 | 2021 | 25.882 | 2020 | 26.556 | 2019 | 27.254 | 2018 | 27.977 | 2017 | 28.725 | 2016 | 29.499 | 2015 | 30.3 | 2014 | 31.126 | 2013 | 31.964 | 2012 | 32.813 | 2011 | 33.675 | 2010 | 34.548 | 2009 | 35.43 | 2008 | 36.322 | 2007 | 37.226 | 2006 | 37.813 | 2005 | 38.352 | 2004 | 38.893 | 2003 | 39.439 | 2002 | 39.986 | 2001 | 40.536 | 2000 | 41.088 | 1999 | 41.643 | 1998 | 42.2 | 1997 | 43.463 | 1996 | 44.732 | 1995 | 46.012 | 1994 | 47.296 | 1993 | 48.583 | 1992 | 49.685 | 1991 | 50.206 | 1990 | 50.726 | 1989 | 51.246 | 1988 | 51.766 | 1987 | 52.286 | 1986 | 52.805 | 1985 | 53.323 | 1984 | 53.84 | 1983 | 54.358 | 1982 | 54.873 | 1981 | 55.388 | 1980 | 55.901 | 1979 | 56.414 | 1978 | 56.925 | 1977 | 57.435 | 1976 | 57.942 | 1975 | 58.449 | 1974 | 58.954 | 1973 | 59.457 | 1972 | 59.957 | 1971 | 60.456 | 1970 | 60.561 | 1969 | 60.663 | 1968 | 60.764 | 1967 | 60.866 | 1966 | 60.967 | 1965 | 61.069 | 1964 | 61.17 | 1963 | 61.271 | 1962 | 61.372 | 1961 | 61.473 | 1960 | 61.646 |
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