| Data | 20,270-C (Hz) | 20,900-D (Hz) | 23,400-E (Hz) | 37,500-F (Hz) | 45,900-G (Hz) |
| 4 April | 72.9 | 72.3 | 73.7 | 93.7 | 87.2 |
| 5 | 71.7 | 71.8 | 73.6 | 93.8 | 86.9 |
| 6 | 71.8 | 70.8 | 73.4 | 93.3 | 88.2 |
| 7 | 71.7 | 74 | 73.4 | 94.1 | 86.9 |
| 8 | 72.9 | 73.2 | 73.3 | 93.5 | 87.4 |
| 9 | 72.5 | 71.8 | 73.3 | 93.3 | 87 |
| 10 | 72.2 | 71.9 | 73.4 | 93.5 | 87.3 |
| 11 | 72.8 | 73.1 | 73.7 | 92.7 | 87.1 |
| 12 | 72.6 | 80.3 | 73.9 | 92.7 | 87.5 |
| 13 | 72 | 78.8 | 75.1 | 93.3 | 87.9 |
| 14 | 71.8 | 80.3 | 75.9 | 93.6 | 87 |
| 15 | 72.2 | 79.2 | 74.5 | 93.7 | 87.4 |
| 16 | 71.8 | 70.1 | 74.3 | 94 | 87.2 |
| 17 | 71.8 | 72 | 74.6 | 93.8 | 87.5 |
| 18 | 72.3 | 72.1 | 76.2 | 93.5 | 87.4 |
| 19 | 71.4 | 71.9 | 76.8 | 93.5 | 87.2 |
| 20 | 71.8 | 71.7 | 76.7 | 93.2 | 88.3 |
| 21 | 71.4 | 72.1 | 74.4 | 94.2 | 87.2 |
| 22 | 71.9 | 72.2 | 73.4 | 94.2 | 87.5 |
| 23 | 71.8 | 72.1 | 73.5 | 94.8 | 87.2 |
| 24 | 73.7 | 72.3 | 73.9 | 94.1 | 87.6 |
| 25 | 72.8 | 72.2 | 73.7 | 94 | 87.6 |
| 26 | 72.2 | 71.8 | 73.7 | 94.1 | 87.7 |
| 27 | 71.1 | 74.4 | 73.7 | 94.3 | 88.6 |
| 28 | 71.2 | 72 | 73.6 | 93.8 | 88 |
| 29 | 70.8 | 72 | 73.3 | 94.2 | 87.2 |
| 30 | 71.2 | 72 | 73.4 | 94.3 | 87.4 |
| 1 May | 71.6 | 72.1 | 73.5 | 94.5 | 88.1 |
| 2 | 71.8 | 73.4 | 73.7 | 95.2 | 88.1 |
| 3 | 71.2 | 71.6 | 73.5 | 95.9 | 87.7 |
| 4 | 71.8 | 73.2 | 75 | 95.9 | 90 |
| 5 | 74.9 | 76.5 | 78.4 | 96.1 | 89 |
| 6 | 71.5 | 72.7 | 74 | 95.8 | 87.5 |
| 7 | 71.1 | 72.3 | 73.8 | 95.9 | 87.1 |
| 8 | 71.3 | 72.3 | 73.8 | 96.2 | 87.3 |