| Frequency | Percent | Valid Percent | Cumulative Percent | ||
| Valid | 1 hour or less | 52 | 17.3 | 17.3 | 17.3 |
| 1 - 2 hours | 113 | 37.7 | 37.7 | 55.0 | |
| 2 - 4 hours | 126 | 42.0 | 42.0 | 97.0 | |
| 4 - 6 hours | 3 | 1.0 | 1.0 | 98.0 | |
| 6 hours or above | 6 | 2.0 | 2.0 | 100.0 | |
| Total | 300 | 100.0 | 100.0 |
| |