|
| 1946 |
1.10 |
0.90 |
0.90 |
0.90 |
| 1947 |
2.40 |
1.60 |
1.30 |
1.30 |
| 1948 |
1.70 |
0.90 |
0.90 |
0.60 |
| 1949 |
0.90 |
1.00 |
0.70 |
0.90 |
| 1950 |
1.00 |
2.10 |
1.70 |
2.00 |
| 1951 |
2.00 |
3.00 |
3.30 |
2.00 |
| 1952 |
2.50 |
1.90 |
1.80 |
2.00 |
| 1953 |
3.20 |
4.10 |
3.70 |
3.40 |
| 1954 |
2.90 |
3.00 |
2.80 |
2.80 |
| 1955 |
3.00 |
3.00 |
3.70 |
3.50 |
| 1956 |
3.20 |
4.20 |
4.00 |
3.70 |
| 1957 |
2.40 |
2.60 |
2.40 |
2.40 |
| 1958 |
2.60 |
2.80 |
2.50 |
2.50 |
| 1959 |
2.80 |
3.20 |
2.80 |
3.00 |
| 1960 |
3.10 |
3.40 |
3.00 |
3.30 |
| 1961 |
3.30 |
3.90 |
3.30 |
3.50 |
| 1962 |
3.70 |
4.10 |
3.70 |
3.90 |
| 1963 |
3.10 |
3.30 |
3.20 |
3.10 |
| 1964 |
3.40 |
3.70 |
3.60 |
3.50 |
| 1965 |
3.70 |
4.10 |
4.10 |
4.00 |
| 1966 |
3.60 |
3.80 |
3.90 |
3.50 |
| 1967 |
3.70 |
4.00 |
3.90 |
3.70 |
| 1968 |
4.00 |
4.30 |
4.40 |
4.30 |
| 1969 |
3.30 |
3.30 |
3.90 |
3.20 |
| 1970 |
3.40 |
3.40 |
3.70 |
3.20 |
| 1971 |
3.80 |
3.80 |
4.10 |
3.90 |
| 1972 |
3.60 |
3.60 |
4.30 |
3.50 |
| 1973 |
3.40 |
3.30 |
4.10 |
3.00 |
| 1974 |
3.80 |
3.60 |
4.30 |
3.60 |
| 1975 |
3.90 |
3.90 |
4.70 |
3.50 |
| 1976 |
3.90 |
4.00 |
4.70 |
3.70 |
| 1977 |
3.90 |
3.90 |
5.00 |
3.90 |
| 1978 |
4.00 |
4.00 |
5.00 |
4.20 |
| 1979 |
4.10 |
4.00 |
5.50 |
4.00 |
| 1980 |
4.60 |
4.40 |
6.00 |
4.30 |
| 1981 |
4.50 |
4.20 |
5.80 |
4.30 |
| 1982 |
4.70 |
4.70 |
5.60 |
4.40 |
| 1983 |
4.90 |
5.30 |
5.80 |
5.00 |
| 1984 |
5.50 |
6.10 |
6.00 |
5.90 |
| 1985 |
5.20 |
5.60 |
6.20 |
6.00 |
| 1986 |
5.50 |
5.40 |
6.30 |
5.80 |
| 1987 |
5.70 |
5.30 |
6.10 |
6.00 |
| 1988 |
6.30 |
5.70 |
7.40 |
6.60 |
| 1989 |
7.60 |
6.80 |
8.20 |
7.70 |
| 1990 |
9.80 |
8.50 |
10.30 |
10.40 |
| 1991 |
10.60 |
9.60 |
10.40 |
11.60 |
| 1992 |
8.80 |
8.10 |
9.70 |
9.20 |
| 1993 |
14.00 |
13.60 |
15.80 |
13.90 |
| 1994 |
14.80 |
14.80 |
14.40 |
13.60 |
| 1995 |
15.30 |
15.40 |
14.00 |
15.90 |
| 1996 |
26.00 |
27.00 |
27.10 |
24.70 |
| 1997 |
25.40 |
30.30 |
24.10 |
20.70 |
| 1998 |
19.50 |
20.20 |
24.30 |
16.40 |
| 1999 |
23.70 |
22.40 |
22.30 |
20.80 |
| 2000 |
31.30 |
28.70 |
27.90 |
30.70 |
| 2001 |
34.70 |
35.60 |
36.40 |
33.20 |
| 2002 |
28.60 |
25.40 |
31.60 |
28.20 |
| 2003 |
34.00 |
31.90 |
33.20 |
31.90 |
| 2004 |
43.70 |
42.40 |
46.90 |
45.70 |
| 2005 |
35.70 |
31.00 |
36.70 |
35.10 |
| 2006 |
32.90 |
32.00 |
35.40 |
34.60 |
| 2007 |
52.00 |
56.00 |
57.40 |
50.20 |
| 2008 |
62.70 |
61.40 |
76.90 |
62.00 |
| 2009 |
43.40 |
45.00 |
53.60 |
40.10 |
|