| Value | Category | Cases | |
|---|---|---|---|
| 1 | 4 or less hours | 588 |
20.7%
|
| 2 | 5 hours | 509 |
17.9%
|
| 3 | 6 hours | 503 |
17.7%
|
| 4 | 7 hours | 428 |
15.1%
|
| 5 | 8 hours | 414 |
14.6%
|
| 6 | 9 hours | 194 |
6.8%
|
| 7 | 10 hours | 81 |
2.9%
|
| 8 | 11 or more hours | 123 |
4.3%
|
| Sysmiss | 201 |