|
Average of years 1934–1938 |
15.0 |
5.8 |
1.5 |
0.3 |
0.9 |
23.5 |
1.4 |
8.3 |
33.2 |
1950 |
15.9 |
5.9 |
1.4 |
0.3 |
0.8 |
24.3 |
1.6 |
8.4 |
34.3 |
1951 |
16.5 |
4.7 |
1.1 |
0.8 |
0.5 |
23.6 |
1.3 |
9.6 |
34.5 |
1952 |
18.6 |
5.4 |
0.7 |
0.4 |
0.6 |
25.7 |
1.5 |
9.2 |
36.4 |
1953 |
14.2 |
5.5 |
0.7 |
0.4 |
0.7 |
21.5 |
1.1 |
5.7 |
28.3 |
1954 |
16.7 |
5.8 |
0.5 |
0.2 |
0.9 |
24.1 |
1.5 |
7.3 |
32.9 |
1955 |
19.1 |
5.6 |
0.5 |
0.5 |
0.7 |
26.4 |
1.6 |
8.9 |
36.9 |
1956 |
21.9 |
5.8 |
0.7 |
0.6 |
0.8 |
29.8 |
1.9 |
9.0 |
40.7 |
1957 |
20.8 |
7.1 |
0.9 |
0.4 |
0.7 |
29.9 |
1.8 |
9.4 |
41.1 |
1958 |
21.1 |
6.7 |
0.6 |
0.6 |
0.8 |
29.8 |
2.0 |
9.5 |
41.3 |
1959 |
23.5 |
7.9 |
0.6 |
1.0 |
0.8 |
33.8 |
2.4 |
9.7 |
45.9 |
1960 |
24.7 |
8.7 |
0.4 |
1.4 |
0.7 |
35.9 |
2.4 |
9.3 |
47.6 |
1961 |
24.8 |
9.4 |
0.3 |
0.9 |
0.9 |
36.3 |
2.6 |
9.4 |
48.3 |
1962 |
26.2 |
9.5 |
0.3 |
0.5 |
0.9 |
37.4 |
2.7 |
9.8 |
49.9 |
1963 |
25.5 |
10.5 |
0.2 |
0.3 |
0.8 |
37.3 |
2.6 |
10.4 |
50.3 |
1964 |
26.5 |
10.3 |
0.1 |
0.3 |
0.7 |
37.9 |
2.5 |
10.9 |
51.3 |
1965 |
27.3 |
9.2 |
0.2 |
0.3 |
1.0 |
38.0 |
2.6 |
11.0 |
51.6 |
1966 |
26.3 |
8.3 |
0.1 |
0.2 |
1.0 |
35.9 |
2.5 |
11.6 |
50.0 |
1967 |
26.9 |
8.7 |
0.1 |
0.2 |
1.0 |
36.9 |
2.5 |
12.2 |
51.6 |
1968 |
29.1 |
8.5 |
0.2 |
0.2 |
0.8 |
38.8 |
2.9 |
12.1 |
53.8 |
1969 |
28.5 |
10.1 |
0.1 |
0.2 |
0.7 |
39.6 |
2.6 |
13.0 |
55.2 |
1970 |
29.8 |
10.1 |
0.1 |
0.2 |
0.6 |
40.8 |
2.6 |
14.2 |
57.6 |
1971 |
31.6 |
9.5 |
0.1 |
0.2 |
0.4 |
41.8 |
3.0 |
14.7 |
59.5 |
1972 |
34.9 |
8.2 |
0.2 |
0.3 |
0.5 |
44.1 |
3.0 |
14.4 |
61.5 |
1973 |
35.7 |
9.5 |
0.1 |
0.1 |
0.3 |
45.7 |
3.0 |
15.0 |
63.7 |
1974 |
37.7 |
9.8 |
0.1 |
0.1 |
0.4 |
48.1 |
3.3 |
15.5 |
66.9 |
1975 |
41.4 |
7.4 |
0.1 |
0.1 |
0.4 |
49.4 |
3.3 |
15.3 |
68.0 |
1976 |
37.1 |
10.1 |
0.0 |
0.1 |
0.3 |
47.6 |
2.8 |
16.5 |
66.9 |
1977 |
40.3 |
8.6 |
0.0 |
0.1 |
0.2 |
49.2 |
3.1 |
16.2 |
67.5 |
1978 |
41.5 |
9.1 |
.. |
.. |
0.3 |
50.9 |
2.9 |
17.0 |
70.8 |
1979 |
39.9 |
9.4 |
.. |
.. |
0.3 |
49.6 |
3.0 |
17.4 |
70.4 |
1980 |
40.2 |
9.6 |
.. |
.. |
0.5 |
50.3 |
3.0 |
18.1 |
71.8 |
1981 |
40.8 |
9.4 |
.. |
.. |
0.5 |
50.7 |
3.2 |
18.7 |
73.0 |
1982 |
40.9 |
9.3 |
.. |
.. |
0.4 |
50.6 |
3.3 |
20.2 |
74.5 |
1983 |
43.3 |
8.3 |
.. |
.. |
0.3 |
51.9 |
3.6 |
19.8 |
75.6 |
1984 |
43.0 |
7.0 |
.. |
.. |
0.4 |
50.4 |
3.6 |
20.9 |
75.2 |
1985 |
43.1 |
8.7 |
.. |
.. |
0.4 |
52.2 |
3.7 |
20.8 |
76.9 |
1986 |
42.6 |
9.1 |
.. |
.. |
0.4 |
52.1 |
3.7 |
22.5 |
78.9 |
1987 |
43.7 |
8.0 |
.. |
.. |
0.3 |
52.0 |
3.8 |
22.7 |
79.2 |
1988 |
42.1 |
7.7 |
.. |
.. |
0.4 |
50.2 |
3.7 |
21.7 |
76.4 |
1989 |
43.3 |
7.6 |
.. |
.. |
0.5 |
51.4 |
3.9 |
22.1 |
78.2 |
1990 |
38.8 |
6.5 |
.. |
.. |
0.4 |
45.7 |
4.0 |
22.8 |
73.1 |
1991 |
37.6 |
7.4 |
.. |
.. |
0.5 |
45.5 |
4.5 |
20.8 |
71.5 |
1992 |
36.0 |
7.4 |
.. |
.. |
0.7 |
44.0 |
5.1 |
23.2 |
73.0 |
1993 |
31.7 |
7.9 |
.. |
.. |
0.6 |
40.2 |
4.4 |
22.3 |
67.5 |
1994 |
29.4 |
8.0 |
.. |
.. |
0.6 |
38.0 |
4.1 |
22.9 |
65.9 |
1995 |
27.1 |
6.8 |
.. |
.. |
0.5 |
34.5 |
3.4 |
24.0 |
62.5 |
1996 |
27.0 |
5.1 |
.. |
.. |
0.5 |
32.6 |
3.0 |
23.2 |
59.4 |
1997 |
26.2 |
4.8 |
.. |
.. |
0.6 |
31.6 |
2.7 |
23.6 |
58.1 |
1998 |
26.6 |
4.3 |
.. |
.. |
0.5 |
31.4 |
2.8 |
26.4 |
60.9 |
1999 |
28.3 |
4.1 |
.. |
.. |
0.4 |
32.8 |
3.2 |
24.2 |
60.5 |
2000 |
28.0 |
4.3 |
.. |
.. |
0.4 |
32.7 |
3.1 |
33.7 |
70.2 |
2001 |
25.2 |
3.9 |
.. |
.. |
0.4 |
29.5 |
3.1 |
34.3 |
67.5 |
2002 |
28.4 |
4.3 |
.. |
.. |
0.3 |
33.0 |
3.3 |
35.1 |
72.3 |
2003 |
27.5 |
4.1 |
.. |
.. |
0.3 |
31.9 |
2.7 |
33.2 |
68.6 |
2004 |
28.8 |
3.9 |
.. |
.. |
0.2 |
32.9 |
2.6 |
32.3 |
68.8 |
2004 |
25.9 |
3.2 |
.. |
.. |
0.1 |
29.2 |
3.0 |
27.7 |
60.9 |
2005 |
26.7 |
3.1 |
.. |
.. |
0.1 |
30.0 |
2.7 |
29.8 |
63.5 |
2006 |
27.9 |
3.4 |
.. |
.. |
0.1 |
31.4 |
2.8 |
30.8 |
65.9 |
2007 |
27.6 |
3.3 |
.. |
.. |
0.1 |
31.0 |
2.5 |
28.7 |
63.2 |
2008 |
25.8 |
2.8 |
.. |
.. |
0.1 |
28.7 |
2.8 |
28.7 |
61.5 |
2009 |
27.0 |
2.6 |
.. |
.. |
0.1 |
29.8 |
2.7 |
27.8 |
61.7 |
2010 |
25.3 |
2.5 |
.. |
.. |
0.1 |
28.0 |
2.7 |
24.6 |
56.7 |
2011 |
24.8 |
2.7 |
.. |
.. |
0.2 |
27.6 |
2.2 |
24.4 |
55.8 |
2012 |
24.5 |
2.4 |
.. |
.. |
0.2 |
27.4 |
2.1 |
25.4 |
56.4 |
2013 |
24.0 |
2.2 |
.. |
.. |
0.1 |
26.3 |
2.2 |
24.9 |
55.5 |
2014 |
25.3 |
2.5 |
.. |
.. |
0.2 |
28.0 |
2.1 |
26.3 |
58.6 |
2015 |
27.5 |
2.8 |
.. |
.. |
0.2 |
30.6 |
2.3 |
28.8 |
63.9 |
2016 |
29.3 |
3.0 |
.. |
.. |
0.1 |
32.5 |
2.0 |
30.0 |
66.4 |
2017 |
30.4 |
3.1 |
.. |
.. |
0.2 |
33.7 |
2.1 |
33.5 |
71.2 |
2018 |
32.9 |
3.3 |
.. |
.. |
0.2 |
36.4 |
1.9 |
35.4 |
75.8 |
|