| 30% | 70% | |
| January | 3.57% |
8.33% |
| February | 3.53% |
8.23% |
| March | 3.53% |
8.24% |
| April | 3.52% |
8.21% |
| May | 3.51% |
8.19% |
| June | 3.54% |
8.26% |
| July | 3.55% |
8.28% |
| August | 3.54% |
8.25% |
| September | 3.52% |
8.21% |
| October | 3.50% |
8.16% |
| November | 3.47% |
8.10% |
| December | 3.45% |
8.05% |