|
| Frequency | Percent | Valid Percent | Cumulative Percent | |
| valid | About 1 hour | 69 | 6.2 | 6.2 | 6.2 |
| 2 - 3 hours | 341 | 30.7 | 30.7 | 36.9 | |
| 3 - 4 hours | 347 | 31.2 | 31.2 | 68.1 | |
| 4 - 5 hours | 186 | 16.7 | 16.7 | 84.8 | |
| over 5 hours | 168 | 15.1 | 15.1 | 99.9 | |
| 6 | 1 | 0.1 | 0.1 | 100.0 | |
| total | 1112 | 100.0 | 100.0 |
| |