| | | | | | | | | | | | | | . | 1970 | 6.2 | 6.4 | 6.1 | 6.1 | 6 | 6 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.6 | . | 1971 | 5.3 | 4.7 | 4.4 | 4.2 | 4.4 | 4.4 | 4.4 | 4.4 | 4.1 | 3.8 | 3.5 | 3.3 | . | 1972 | 3.3 | 3.8 | 3.5 | 3.5 | 3.2 | 3 | 3 | 2.9 | 3.2 | 3.2 | 3.4 | 3.4 | . | 1973 | 3.6 | 3.9 | 4.8 | 5.3 | 5.5 | 6 | 5.7 | 7.4 | 7.4 | 8.1 | 8.3 | 8.9 | . | 1974 | 9.6 | 10 | 10.1 | 10.1 | 10.7 | 10.9 | 11.5 | 10.9 | 11.9 | 11.8 | 12.2 | 12.1 | . | 1975 | 11.8 | 11.2 | 10.5 | 10.2 | 9.3 | 9.2 | 9.5 | 8.6 | 7.9 | 7.6 | 7.4 | 7.1 | . | 1976 | 6.7 | 6.3 | 6.1 | 5.8 | 6.2 | 6 | 5.6 | 5.7 | 5.5 | 5.5 | 5.1 | 5 | . | 1977 | 5.2 | 6.1 | 6.4 | 7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.4 | 6.4 | 6.7 | 6.7 | . | 1978 | 6.8 | 6.2 | 6.4 | 6.5 | 7.1 | 7.4 | 7.7 | 7.9 | 8.5 | 8.9 | 8.9 | 9 | . | 1979 | 9.3 | 9.8 | 10.3 | 10.5 | 10.7 | 11.1 | 11.5 | 11.8 | 11.9 | 12.1 | 12.6 | 13.3 | . | 1980 | 13.9 | 14.2 | 14.6 | 14.6 | 14.4 | 14.3 | 13.2 | 12.9 | 12.8 | 12.6 | 12.6 | 12.4 | . | 1981 | 11.8 | 11.4 | 10.6 | 10.1 | 9.8 | 9.7 | 10.8 | 10.8 | 11 | 10.3 | 9.6 | 8.9 | . | 1982 | 8.3 | 7.6 | 6.9 | 6.6 | 6.9 | 7.2 | 6.6 | 6 | 4.9 | 5 | 4.5 | 3.8 | . | 1983 | 3.7 | 3.5 | 3.6 | 4 | 3.4 | 2.5 | 2.4 | 2.5 | 2.8 | 2.8 | 3.2 | 3.8 | . | 1984 | 4.3 | 4.7 | 4.9 | 4.6 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4 | . | 1985 | 3.5 | 3.6 | 3.8 | 3.6 | 3.6 | 3.7 | 3.5 | 3.4 | 3.2 | 3.2 | 3.5 | 3.8 | . | 1986 | 4 | 3.2 | 2.2 | 1.6 | 1.7 | 1.8 | 1.7 | 1.6 | 1.8 | 1.6 | 1.3 | 1.2 | . | 1987 | 1.4 | 1.9 | 2.8 | 3.7 | 3.7 | 3.7 | 3.9 | 4.3 | 4.3 | 4.4 | 4.5 | 4.3 | . | 1988 | 4.1 | 3.9 | 3.8 | 4 | 4 | 4 | 4.1 | 4.1 | 4.2 | 4.3 | 4.2 | 4.4 | . | 1989 | 4.5 | 4.6 | 4.9 | 5 | 5.3 | 5.2 | 5.1 | 4.6 | 4.4 | 4.6 | 4.7 | 4.6 |
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| | | | | | | | | | | | | | . | 1990 | 5.2 | 5.3 | 5.2 | 4.7 | 4.4 | 4.7 | 4.8 | 5.7 | 6.2 | 6.4 | 6.2 | 6.3 | . | 1991 | 5.6 | 5.3 | 4.8 | 4.8 | 5 | 4.7 | 4.4 | 3.8 | 3.4 | 2.8 | 3.1 | 3 | . | 1992 | 2.7 | 2.8 | 3.2 | 3.2 | 3 | 3 | 3.2 | 3.1 | 3 | 3.3 | 3.1 | 3 | . | 1993 | 3.3 | 3.2 | 3 | 3.2 | 3.2 | 3 | 2.8 | 2.8 | 2.8 | 2.8 | 2.7 | 2.8 | . | 1994 | 2.5 | 2.5 | 2.7 | 2.4 | 2.3 | 2.5 | 2.7 | 2.9 | 3 | 2.6 | 2.6 | 2.6 | . | 1995 | 2.9 | 2.9 | 2.8 | 3.1 | 3.1 | 3 | 2.8 | 2.6 | 2.5 | 2.7 | 2.6 | 2.5 | . | 1996 | 2.8 | 2.7 | 2.8 | 2.8 | 2.8 | 2.8 | 2.9 | 2.8 | 3 | 3.1 | 3.3 | 3.4 | . | 1997 | 3 | 3 | 2.8 | 2.4 | 2.2 | 2.2 | 2.2 | 2.3 | 2.2 | 2.1 | 1.9 | 1.7 | . | 1998 | 1.6 | 1.4 | 1.4 | 1.4 | 1.7 | 1.6 | 1.7 | 1.6 | 1.4 | 1.5 | 1.5 | 1.6 | . | 1999 | 1.7 | 1.7 | 1.7 | 2.3 | 2.1 | 2 | 2.1 | 2.3 | 2.6 | 2.6 | 2.6 | 2.7 | . | 2000 | 2.8 | 3.2 | 3.8 | 3 | 3.1 | 3.7 | 3.6 | 3.4 | 3.5 | 3.5 | 3.4 | 3.4 | . | 2001 | 3.7 | 3.5 | 3 | 3.2 | 3.6 | 3.2 | 2.7 | 2.7 | 2.6 | 2.1 | 1.9 | 1.6 | . | 2002 | 1.2 | 1.1 | 1.4 | 1.6 | 1.2 | 1.1 | 1.5 | 1.7 | 1.5 | 2 | 2.3 | 2.5 | . | 2003 | 2.6 | 3 | 3.1 | 2.2 | 2.1 | 2.1 | 2.1 | 2.2 | 2.3 | 2 | 1.8 | 1.9 | . | 2004 | 2 | 1.7 | 1.7 | 2.3 | 2.9 | 3.2 | 3 | 2.7 | 2.5 | 3.2 | 3.6 | 3.3 | . | 2005 | 2.9 | 3 | 3.1 | 3.4 | 2.9 | 2.5 | 3.1 | 3.6 | 4.7 | 4.4 | 3.5 | 3.4 | . | 2006 | 4 | 3.6 | 3.4 | 3.6 | 4.1 | 4.3 | 4.2 | 3.9 | 2.1 | 1.3 | 2 | 2.5 | . | 2007 | 2.1 | 2.4 | 2.8 | 2.6 | 2.7 | 2.7 | 2.4 | 1.9 | 2.8 | 3.5 | 4.3 | |
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