1976
12.4
11.7
10.8
11.1
20.1
66.9
174
186
141
46.9
20.3
18.05
1977
11.4
11.6
11.05
13.6
27.45
33.5
168
242
140
65.5
36.8
18.7
1978
13.4
11.8
11.3
16.1
34.8
105
201
207
116
62.4
27.1
17.4
1979
13.8
11.4
9.48
11.7
20.3
49.4
172
238
109
47.7
23.4
18.7
1980
12.8
11
10.4
15.3
28.3
76.5
280
225
224
53.8
23.3
16.1
1981
12.1
10.6
8.64
17.2
24.7
82.1
275
261
209
71.6
42.7
31.7
1982
12.8
11.7
13.9
21
25.9
70.6
189
232
186
44.8
26.9
18.3
1983
14.8
11.2
11
10.5
26.6
38.5
97.1
219
294
54.65
33.17
20.97
1984
13.9
11.7
10.5
14.9
26.5
59.9
354
257
196
64.5
39.45
23.65
1985
13.9
11.8
15.4
19
27.4
79.8
344
235
212
109
44.1
25.9
1986
17.8
15
12.1
11.1
21.1
106
304
210
279
63.7
34.8
21.4
1987
13.7
10.7
11.6
19.5
24.7
72.2
246
273
128
53.8
31.5
20.9
1988
14
10.6
11.5
19.8
27.8
62.4
288
340
127
47.27
31.5
18.5
1989
16.7
13.7
13.2
13.9
24.6
45.2
333
407
126
40.75
31.5
16.1
1990
14.4
13
14.8
22.2
28.7
65.2
192
140
107
42.1
23
14.6
1991
12.4
11.6
10.7
13.1
20
47.8
158
142
145
39.4
19.4
13.4
1992
12.4
11.1
10.9
11.2
14.2
30.7
66.7
155
94.7
45.8
24.2
12.1
1993
12
12
11.7
12
12.6
22.9
41.6
98.4
78.4
32
18.7
14.1
1994
13.95
9.65
9.93
9.34
13.9
56.8
102
117
90.8
34.6
18.1
16.3
1995
14.9
13.8
12.61
15
24.7
86.2
170
190
72.6
27.3
13.9
8.08
1996
15.04
12.52
15.3
23
20.9
33.3
216
282
121
55.9
24.3
15.5
1997
15.15
11.24
13.27
22.17
17.8
35.2
114
89
66.2
32.7
20.6
17.6
1998
14.87
11.27
11.25
21.35
27.15
63.07
174
267
153
70.1
37.9
16.60
1999
15.5
11.2
12.2
24.3
36.5
90.95
196
222
133
62.05
33.15
15.60
2000
14.25
11.35
10.3
18.4
32.2
110
218
251
174
54
28.4
17.1
2001
13
11.5
9.44
11.9
20.9
71.9
229
268
130
40
22.5
14.1
2002
13.1
10.2
11.4
17.2
28.1
53.4
235
202
97.6
41.9
29.9
21
2003
15.5
14.2
14.8
20.5
27.70
47.90
195.5
190.5
128.80
44.57
28.52
19.65
2004
15.6
12
14
16.5
21.3
42.4
156
179
160
47.25
27.15
18.30
2005
15.7
13.3
13.9
15.25
26
45.15
140
142
96
49.9
29.4
19
2006
14.4
13.6
12.7
14
30.7
43.77
117
113
92.4
44.6
24.9
17.6




















































