1953
1954
1955
1956
1957
1958
1959
1960
1961 | 15.8
12.2
10.9
13.6
14.1
18.2
16.5
21.0
18.7 | 4.6
8.7
18.7
36.2
26.6
37.9
39.4
50.6
34.9 | 193.5
148.2
178.6
186.4
176.6
282.4
258.0
283.6
156.0 | 1962
1963
1964
1965
1966
1967
1968
1969 | 20.0
26.2
27.5
23.4
22.4
23.6
21.8
20.8 | 50.5
71.3
69.9
52.2
51.9
54.7
48.0
42.3 | 310.1
319.6
279.2
257.7
287.5
279.3
243.7
214.6 | 1970
1971
1972
1973
1974
1975
1976
1977 | 0.6
19.6
19.3
21.8
21.8
23.1
13.0
17.8 | 28.2
44.3
46.5
54.9
43.1
43.8
37.5
34.2 | 55.9
21.5
51.1
57.9
2.2
62.6
5.6
28.9 | 1978
1979
1980
1981
1982
1983
1984
1985 | 24.0
17.9
17.2
21.2
18.8
16.8
13.8
4.0 | 33.4
47.4
36.3
35.5
23.7
11.8
48.6
26.9 | 46.0
70.6
63.5
24.8
12.7
30.7
15.9 |