1974
5.51
4.34
3.72
8.64
21.1
37.8
65.4
61.9
47.3
37.7
13.9
7.91
1975
5.96
4.67
3.82
4.43
22.8
39.8
40.0
22.3
40.5
27.6
9.24
6.42
1976
5.18
4.68
3.90
4.08
11.1
37.6
37.8
39.1
31.4
17.2
9.66
7.20
1977
5.96
5.11
4.75
12.9
22.1
21.2
29.1
51.6
30.0
19.9
13.2
7.71
1978
5.94
4.95
4.69
6.41
17.8
39.5
57.3
50.7
38.9
19.2
11.8
8.27
1979
6.45
5.73
4.82
6.27
8.85
16.9


58.6
18.9
8.29
6.33
1980
4.68
4.07
4.08
4.97
12.0
28.3


41.6
15.4
8.42
5.99
1981
4.74
3.96
3.68
9.00
10.7
17.0
38.9
49.9
32.8
11.6
7.80
5.77
1982
4.73
4.44
4.15
6.17
11.2
26
64
43.1
32
15.1
11.3
8.03
1983
6.05
4.92
4.27
4.51
26.5
33
70.1
49.8
53.9
24.6
13.5
8.75
1984
6.52
5.80
4.63
9.27
28.4
29
69.4
39.9
58.7
23.3
14.4
9.47
1985
6.99
6.25
5.55
6.28
18.1
54.5
85.4
65.8
59.4
25.8
15.9
9.43
1986
6.56
5.01
4.39
7.27
8.96
27.7
46.9
50.8
52
28.4
12.7
7.92
1987
5.64
4.46
5.50
7.06
10.6
19.8
48.3
59.2
77.6
39.3
18.7
10.1
1988
7.07
5.92
5.97
6.55
11.7
21.3
52.4
80.6
67.3
28.8
12.8
8.53
1989
6.96
5.56
6.37
5.21
11.8
27.7
54.1
63
74.4
25
16
10.4
1990
6.91
6.43
6.68
9.16
23.1
35.3
50.3
70.5
67.5
24.2
13.5
8.67
1991
7.09
4.92
4.52
7.37
14.9
42.9
46.5
78.1
60.7
23.4
11
6.95
1992
6.38
5.13
4.05
6.37
9.53
22.9
65.5
52.8
43.3
34.6
12.5
7.37
1993
5.68
5.34
3.59
5.73
18.1
22.8
44.1
77.3
45.9
37
14.1
7.80
1994
6.18
4.62
5.04
5.41
10.2
34
39.8
67.9
72.7
24.9
13.7
10
1995
7.52
6.73
5.81
5.07
22.6
51.5
52.3
68.4
49.1
25
16.4
11.2









































































































































































