|
| Frequency | Percent | Valid Percent | Cumulative Percent | |
| valid | in 1 hour | 347 | 31.2 | 31.2 | 31.2 |
| 1 - 2 hours | 528 | 47.5 | 47.5 | 78.7 | |
| 2 - 3 hours | 199 | 17.9 | 17.9 | 96.6 | |
| 3 - 4 hours | 20 | 1.8 | 1.8 | 98.4 | |
| over 4 hours | 18 | 1.6 | 1.6 | 100.0 | |
| total | 1112 | 100.0 | 100.0 |
| |