1977
39.1
35.5
31.9
37.2
73.1
152
605
615
361
151
81.2
52.2
1978
41.35
36.4
33
48.85
113.55
189.50
577.50
531.50
2678
134
78.80
63.2
1979
43.6
37.3
34.1
60.5
154
227
550
448
218
117
76.4
61.1
1980
48.9
43.4
53.2
81.0
253
271
619
783
459
179
89.8
53.3
1981
46.3
42.2
43.7
76.5
162
261
602
728
418
207
115
63.3
1982
42.4
34.5
55.5
186
230
435
548
797
622
346
68.0
41.9
1983
40.0
39.7
45.3
67.0
148
181
319
498
506
265
117
64.8
1984
43.9
37.6
39.9
41.3
113
219
557
444
359
136
66.2
48.6
1985
36.6
27.1
26.6
53
84.8
179
463
516
419
313
106
63
1986
45.7
37.7
28.6
53.7
62.3
300
658
604
298
166
122
79.6
1987
38
28.9
28.4
44.2
79.9
226
382
381
314
118
64.8
44.9
1988
33.2
27.9
36.3
68.4
130
173
561
678
325
144
79
55.8
1989
49.4
39.9
39.7
52.2
114
194
426
552
346
152
80.6
49.8
1990
38.8
32.7
43.4
69.1
161
263
564
607
423
175
88.1
53.3
1991
40.9
35.7
43
65.8
151
228
365
564
367
130
74.4
55.9
1992
44.5
39.8
37.8
44.6
68.4
127
304
626
415
137
77.9
57.3
1993
45.3
40.4
43.3
71
186
198
319
400
345
140
75.5
50.1
1994
37.7
39.5
38.9
36.1
92.5
188
380
541
354
124
67.2
38.6
1995
41.2
38
36.7
56.1
158
203
359
545
296
113
71.5
49.3
1996
36.9
33.2
40
58.6
136
198
412
611
404
215
95.7
60.4
1997
46.7
35.4
30.4
44.2
70.5
194
486
407
348
112
72.5
59.2
1998
44.5
36.9
38.9
80.5
180
238
528
635
361
185
94.3
62.5
1999
46.7
36.4
31.1
43.6
70.3
215
470
567
412
264
84
52.6
2000
37.2
27.6
28.1
54
118
256
536
571
484
166
84.5
56.7
2001
42.8
33.2
29.8
42
104
269
498
559
295
121
90.1
64.7
2002
48.6
41.3
52.3
82.6
189
230
335
597
372
150
96.5
55
2003
42.2
42.1
49.4
73
124
234
518
611
483
129
80.2
61.1
2004
46.9
40.3
40
41.4
111
201
539
535
278
245
130
78.4
2005
43.4
40
44.7
67.5
102
158
504
560
281
157
86.6
53.8
2006
37.3
32.5
32.1
37.6
63.6
147
485
673
295
161
109
52.2

































































