| Number of session | Numbers | % |
| 1 | 4 | 6 |
| 2 | 1 | 1.5 |
| 3 | 6 | 8.9 |
| 4 | 31 | 46.3 |
| 5 | 6 | 8.9 |
| 6 | 13 | 19.4 |
| 7 | 1 | 1.5 |
| 8 | 5 | 7.5 |
| Total | 67 | 100 |