| Days | Frequency | Percent |
| 1 | 21 | 29.2 |
| 2 | 25 | 34.7 |
| 3 | 11 | 15.3 |
| 4 | 10 | 13.9 |
| 5 | 2 | 2.8 |
| 6 | 2 | 2.8 |
| 8 | 1 | 1.4 |
| Total | 72 | 100.0 |