| Cycles | Number (n) | Rate (%) | Cycles | Number (n) | Rate (%) |
| 1 | 20 | 18.0 | 5 | 78 | 70.3 |
| 2 | 35 | 31.5 | 6 | 85 | 76.6 |
| 3 | 60 | 54.1 | 7 | 87 | 78.4 |
| 4 | 74 | 66.7 | 8 | 91 | 82.0 |