Year | Value | 2022 | 4.909 | 2021 | 4.985 | 2020 | 5.062 | 2019 | 5.141 | 2018 | 5.22 | 2017 | 5.301 | 2016 | 5.383 | 2015 | 5.466 | 2014 | 5.551 | 2013 | 5.636 | 2012 | 5.723 | 2011 | 5.812 | 2010 | 5.901 | 2009 | 5.992 | 2008 | 6.084 | 2007 | 6.178 | 2006 | 6.273 | 2005 | 6.369 | 2004 | 6.466 | 2003 | 6.565 | 2002 | 6.666 | 2001 | 6.767 | 2000 | 6.871 | 1999 | 7.054 | 1998 | 7.267 | 1997 | 7.487 | 1996 | 7.713 | 1995 | 7.945 | 1994 | 8.184 | 1993 | 8.429 | 1992 | 8.68 | 1991 | 8.939 | 1990 | 9.204 | 1989 | 8.998 | 1988 | 8.646 | 1987 | 8.305 | 1986 | 7.977 | 1985 | 7.661 | 1984 | 7.357 | 1983 | 7.063 | 1982 | 6.781 | 1981 | 6.509 | 1980 | 6.247 | 1979 | 7.263 | 1978 | 8.964 | 1977 | 11.017 | 1976 | 13.466 | 1975 | 16.368 | 1974 | 19.748 | 1973 | 23.629 | 1972 | 28.001 | 1971 | 32.847 | 1970 | 38.08 | 1969 | 40.216 | 1968 | 41.262 | 1967 | 42.32 | 1966 | 43.383 | 1965 | 44.452 | 1964 | 45.525 | 1963 | 46.604 | 1962 | 47.686 | 1961 | 48.77 | 1960 | 49.853 |
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