| Día | Enero | Febrero | Marzo | Abril | Mayo | Junio |
| 1 | 27.66 | 27.90 | * | 28.00 | ||
| 2 | 28.10 | 27.75 | 27.85 | 27.78 | 27.98 | |
| 3 | 28.00 | 27.82 | 27.82 | 28.07 | 27.69 | * |
| 4 | 28.02 | * | * | 28.11 | 27.62 | * |
| 5 | 28.00 | * | * | 28.16 | 27.49 | 28.03 |
| 6 | * | 27.77 | 27.78 | 28.09 | * | 28.12 |
| 7 | * | 27.85 | 27.88 | 28.09 | * | 28.17 |
| 8 | * | 27.95 | 27.90 | * | 27.70 | 28.17 |
| 9 | 28.07 | 27.93 | 27.95 | * | 27.76 | 28.12 |
| 10 | 28.05 | 27.98 | 27.85 | 28.07 | 27.71 | * |
| 11 | 28.15 | * | * | 28.15 | 27.70 | * |
| 12 | 28.06 | * | * | 28.17 | 27.63 | 28.02 |
| 13 | 28.10 | 27.90 | 27.80 | * | * | 28.00 |
| 14 | * | 27.80 | 27.88 | * | * |
27.95 |
| 15 | * | 27.75 | 27.73 | * | 27.72 | 27.94 |
| 16 | 28.11 | 27.65 | 27.70 | * | 27.72 | 27.89 |
| 17 | 28.03 | 27.66 | 27.72 | * | 27.76 | * |
| 18 | 28.00 | * | * | 28.10 | 27.98 | * |
| 19 | 28.00 | * | * | 28.10 | 27.82 | * |
| 20 | 27.96 | 27.67 | 27.69 | 28.12 | * | 27.90 |
| 21 | * | 27.73 | 27.78 | 28.11 | * | 27.92 |
| 22 | * | 27.79 | 27.87 | * | * | 27.90 |
| 23 | 27.76 | 27.90 | 28.09 | * | 27.87 | 27.87 |
| 24 | 27.69 | 28.00 | 28.01 | 28.00 | 27.84 | * |
| 25 | 27.75 | * | 27.85 | 27.91 | * | |
| 26 | 27.70 | * | 27.75 | 27.91 | 27.82 | |
| 27 | 27.70 | * | 28.06 | 27.78 | * | 27.82 |
| 28 | * | * | 28.00 | 27.80 | * | 27.88 |
| 29 | * | 28.25 | * | 27.89 | 27.91 | |
| 30 | 27.60 | 28.20 | * | 27.90 | 27.95 | |
| 31 | 27.58 | 28.11 | * | 27.92 | * |