Date          [1]      [2]      [3]      [4]
17 Apr.      91.8      4.6      2.4      1.2
18 Apr.      91.9      4.6      2.3      1.2
19 Apr.        92      4.6      2.3      1.2
20 Apr.      92.1      4.5      2.2      1.3
21 Apr.      92.2      4.4      2.3      1.2
22 Apr.      92.1      4.5      2.2      1.2
23 Apr.      91.9      4.5      2.4      1.2
24 Apr.      91.9      4.4      2.4      1.2
25 Apr.      91.8      4.6      2.2      1.4
26 Apr.      91.6      4.7      2.2      1.5
27 Apr.      91.4      4.9      2.3      1.4
28 Apr.      91.5      4.9      2.2      1.4
29 Apr.      91.4      4.9      2.3      1.4
30 Apr.      91.7      4.6      2.3      1.4
1 May        91.8      4.5      2.3      1.3
2 May        92.1      4.4      2.2      1.3
3 May        92.4      4.2      2.1      1.3
4 May        92.4      4.4        2      1.3
5 May        92.4      4.4        2      1.2
6 May        92.5      4.2      2.1      1.2
7 May        92.3      4.3      2.2      1.2
8 May        92.2      4.5      2.1      1.2
9 May        92.1      4.6      2.1      1.2
10 May       92.3      4.4      2.1      1.2
11 May       92.5      4.1      2.2      1.2
12 May       92.4      4.1      2.1      1.3
13 May       92.4      4.1      2.2      1.3
14 May       92.3      4.3        2      1.3
15 May       92.2      4.5      1.9      1.4
16 May       91.9      4.7      1.9      1.5
17 May         92      4.5        2      1.5