1966
12.6
11.1
10.3
10
13.8
40.6
105
155
95.5
31.8
18.2
13.2
1967
10.5
9.28
8.60
11.5
12.2
25.5
109
121
94
40.4
22.7
16.6
1968
13.2
11.3
11.3
12.4
15.9
45.6
136
131
95
52.5
19.8
13.3
1969
10.5
8.91
8.68
9.15
11.1
27.7
105
128
114
43.9
21.9
15.6
1970
12.4
10.8
10.1
11.8
13.6
41.8
156
168
72.9
58.1
27.4
16.5
1971
11
8.06
7.68
11.3
17
124
181
173
98.5
59
27.1
16.8
1972
13.4
11.6
11.7
11.7
17.4
31.1
132
163
117
40.1
22.1
15.3
1973
12
10.9
11.4
12.6
15.9
79.1
108
167
139
67.3
26.7
15.8
1974
12
9.96
9.17
10.4
11.9
35.2
142
189
118
60
28.5
17.6
1975
12.5
9.90
8.71
10.8
15
53.8
138
125
128
61.6
24.3
14.5
1976
10.9
9.35
8.50
8.85
11.4
46.5
102
135
105
38.4
22
15.1
1977
12
10.5
9.74
10.9
13.2
28
131
172
92.7
47.4
25.3
17.6
1978
14
12.1
12.1
14.1
25.1
74.8
151
163
84.6
50
22.1
15.1
1979
11.9
10.5
9.22
9.89
12.4
32.7
121
131
80.3
32.4
19.2
14.1
1980
11.4
10.1
10.1
11.7
12.7
50.2
147
113
74.3
29.8
17.3
12.9
1981
10.4
9.22
8.74
10.3
12.9
30.6
90.8
176
122
39.4
22.9
16.8
1982
13.7
12.6
12.6
15
17.3
49.8
153
162
89.2
25.5
16.7
13.8
1983
12.1
11.2
11.1
11.6
15.5
20.7
112
325
224
85
32.4
21.2
1984
17
15.1
14.5
14.2
21.1
74.8
201
120
133
29.8
17.4
14.2
1985
12.3
11.4
11.5
11
11.7
26.1
143
191
302
117
37.7
20.6
1986
15.9
13.9
12.8
14.4
15.2
86.9
215
183
144
57.2
27.7
17.3
1987
12.6
10.9
10.3
13.2
15.2
69.6
188
187
121
48.1
23.14
15.4
1988
12.5
11
10.6
12
15.2
52.4
162
240
99.6
39
19.1
13.6
1989
11.5
10.4
10.3
11.9
24.8
55.7
132
184
122
55.6
29.3
21.1
1990
17
14.2
13.1
17.1
24.2
62.9
158
133
112
51.7
28
24.3
1991
14.1
10.7
10.3
10.8
18.1
56.4
96.1
154
111
38.9
21.8
14.8
1992
10.4
7.84
7.37
8.19
10.5
28
65.5
118
87.1
50.2
27
16.6
1993
11.4
9.38
6.80
9.16
18.1
35
88.7
178
109
57.9
29.4
19.2
1994
13.6
11.1
11.5
10.9
16.2
67
97.4
125
94.4
39.6
18.3
11.6
1995
8.44
7.45
7.87
9.51
32.7
79.4
127
159
93.5
42.6
25.1
11.9

































































