1977
49.1
46.9
51.2
58.0
86.4
204
561
574
361
179
107
67.0
1978
47.0
43.6
45.4
61.3
166
337
501
586
335
228
122
77.9
1979
53.3
42.8
43.4
54.7
105
198
442
451
267
144
87.6
56.0
1980
41.9
38.2
38.8
60.3
84.8
262
574
588
355
168
99.9
65.5
1981
48.5
42.1
43.0
56.1
93.3
274
615
539
339
148
95.6
62.2
1982
49.0
45.7
62.5
82.6
89.7
212
369
520
357
129
85.6
60.1
1983
45.8
40.3
42.0
44.2
77.2
165
345
448
394
200
104
67.0
1984
52.3
38.8
39.7
39.9
113
283
536
386
317
118
82.2
64.7
1985
52.4
50.7
58.4
62.2
69.5
141
361
320
337
200
96.1
68.7
1986
51.9
51.0
50.3
63.3
78.5
293
599
519
407
174
102
67.3
1987
50.8
45.8
44.3
58.1
82.5
235
512
574
333
154
96.2
69.7
1988
55.3
49.6
51.1
66.4
108
234
595
682
336
142
85.5
65.1
1989
57.7
48.4
49.7
62.7
142
245
451
542
370
157
79.6
56.3
1990
46.9
40.9
39.1
55.5
118
396
904
746
556
221
99.8
69.1
1991
57.2
49.6
49.6
56.5
113
285
595
904
611
208
90.2
64.8
1992
52.2
44.5
43.8
52.0
62.3
160
408
814
508
184
87.6
61.0
1993
50.5
46.6
41.8
55.7
110
256
547
837
522
220
89.2
61.5
1994
46.9
40.3
42.1
41.2
79.3
323
556
656
448
150
79.7
57.8
1995
42.5
36.2
38.8
60.3
92
274
515
744
478
179
116
64.4
















































































































































































































