| Jan | Feb | March | April | May | June | July | Aug | Sept | Oct | Nov | Dec |
| 1 | 0.5 | 2.7 | 0.0 | 0.0 | 3.0 | 0.0 | 0.3 | 2.7 | 0.0 | 3.0 | 0.0 | 0.0 |
| 2 | 3.1 | 19.8 | 0.0 | 0.3 | 0.6 | 0.0 | 0.0 | 1.5 | 0.0 | 1.5 | 0.0 | 0.0 |
| 3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 0.3 | 4.5 | 0.9 | 0.0 | 0.9 | 0.0 | 16.2 |
| 4 | 18.9 | 0.0 | 6.6 | 4.8 | 0.6 | 0.9 | 3.6 | 6.0 | 0.0 | 0.0 | 0.0 | 6.3 |
| 5 | 2.7 | 0.0 | 12.0 | 2.1 | 0.0 | 20.1 | 6.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 6 | 5.9 | 0.0 | 5.4 | 0.0 | 0.0 | 3.6 | 4.8 | 0.0 | 3.0 | 0.0 | 0.0 | 0.0 |
| 7 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 4.5 | 1.5 | 0.0 | 1.2 | 0.0 | 0.0 | 0.0 |
| 8 | 6.3 | 0.0 | 5.4 | 0.0 | 0.0 | 0.0 | 2.1 | 2.7 | 0.3 | 0.0 | 0.0 | 0.0 |
| 9 | 3.6 | 0.0 | 12.3 | 0.0 | 0.0 | 0.0 | 0.3 | 3.9 | 0.6 | 0.0 | 0.0 | 0.0 |
| 10 | 0.0 | 0.0 | 2.1 | 0.0 | 25.2 | 0.9 | 0.0 | 2.7 | 0.0 | 0.0 | 0.6 | 0.0 |
| 11 | 0.5 | 0.9 | 0.0 | 0.3 | 0.3 | 5.4 | 24.3 | 4.8 | 0.0 | 0.0 | 0.0 | 0.6 |
| 12 | 0.9 | 0.3 | 1.8 | 0.0 | 0.0 | 0.6 | 7.5 | 3.0 | 7.5 | 0.0 | 1.5 | 0.3 |
| 13 | 0.0 | 0.0 | 3.3 | 0.0 | 0.3 | 2.4 | 0.3 | 6.3 | 0.0 | 0.3 | 0.3 | 0.0 |
| 14 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 11.4 | 2.7 | 0.3 | 0.6 | 15.0 | 4.2 | 0.0 |
| 15 | 0.0 | 0.0 | 0.0 | 1.2 | 0.3 | 0.0 | 0.3 | 0.0 | 0.0 | 1.2 | 0.0 | 0.0 |
| 16 | 0.5 | 0.6 | 0.0 | 1.5 | 0.0 | 3.0 | 0.0 | 0.3 | 0.0 | 0.0 | 0.0 | 3.6 |
| 17 | 0.0 | 0.3 | 0.0 | 1.2 | 0.0 | 2.7 | 7.8 | 14.7 | 0.0 | 0.0 | 0.0 | |
| 18 | 0.0 | 0.0 | 0.0 | 3.6 | 6.3 | 0.0 | 10.5 | 0.0 | 0.0 | 0.0 | 0.0 | |
| 19 | 0.0 | 0.0 | 0.0 | 0.0 | 11.7 | 0.3 | 0.0 | 3.3 | 1.5 | 0.0 | 8.7 | |
| 20 | 0.0 | 0.0 | 9.3 | 0.0 | 2.4 | 0.0 | 0.6 | 5.1 | 0.0 | 0.0 | 0.3 | |
| 21 | 1.3 | 3.9 | 16.5 | 0.0 | 0.0 | 1.2 | 2.1 | 2.4 | 0.0 | 0.0 | 0.0 | |
| 22 | 2.3 | 0.0 | 0.3 | 1.8 | 0.0 | 0.6 | 0.3 | 1.8 | 0.0 | 0.0 | 0.0 | |
| 23 | 1.8 | 0.0 | 0.3 | 5.4 | 0.3 | 0.9 | 3.3 | 1.8 | 0.0 | 0.0 | 2.1 | |
| 24 | 0.0 | 0.6 | 2.1 | 0.0 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | 0.0 | 0.6 | |
| 25 | 0.0 | 0.0 | 1.2 | 0.0 | 0.0 | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | |
| 26 | 2.3 | 0.0 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 0.0 | 0.0 | |
| 27 | 0.0 | 28.2 | 0.3 | 0.0 | 0.3 | 8.4 | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 | |
| 28 | 0.0 | 0.0 | 5.4 | 0.0 | 3.3 | 3.3 | 0.0 | 1.5 | 0.0 | 11.4 | 0.6 | |
| 29 | 0.0 | | 0.9 | 0.0 | 3.0 | 0.9 | 0.0 | 0.3 | 0.0 | 1.8 | 0.0 | |
| 30 | 2.7 | | 0.0 | 0.9 | 6.0 | 0.6 | 9.6 | 0.0 | 0.0 | 0.0 | | |
| 31 | 1.8 | | 0.0 | | 0.0 | | 4.2 | 2.4 | | 0.0 | | |
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