| Jan | Feb | March | April | May | June | July | Aug | Sept | Oct | Nov | Dec |
1 | 2.4 | 6.7 | | | | | | | | | | |
2 | 5.2 | 4.1 | | | | | | | | | | |
3 | 8.9 | 12.2 | | | | | | | | | | |
4 | 1.2 | 9.1 | | | | | | | | | | |
5 | 4.9 | 7.8 | | | | | | | | | | |
6 | 1.4 | 8.0 | | | | | | | | | | |
7 | 7.0 | 10.2 | | | | | | | | | | |
8 | 6.5 | 11.5 | | | | | | | | | | |
9 | 4.0 | 11.2 | | | | | | | | | | |
10 | 11.9 | 11.2 | | | | | | | | | | |
11 | 9.1 | 1.7 | | | | | | | | | | |
12 | 3.8 | | | | | | | | | | | |
13 | 7.7 | | | | | | | | | | | |
14 | 9.1 | | | | | | | | | | | |
15 | 5.1 | | | | | | | | | | | |
16 | 3.2 | | | | | | | | | | | |
17 | 11.0 | | | | | | | | | | | |
18 | 11.0 | | | | | | | | | | | |
19 | 9.1 | | | | | | | | | | | |
20 | 11.7 | | | | | | | | | | | |
21 | 4.1 | | | | | | | | | | | |
22 | 0.7 | | | | | | | | | | | |
23 | 10.8 | | | | | | | | | | | |
24 | 12.4 | | | | | | | | | | | |
25 | 13.2 | | | | | | | | | | | |
26 | 5.8 | | | | | | | | | | | |
27 | 6.7 | | | | | | | | | | | |
28 | 12.7 | | | | | | | | | | | |
29 | 7.6 | | | | | | | | | | | |
30 | 9.3 | | | | | | | | | | | |
31 | 10.6 | | | | | | | | | | | |
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