| Value | Category | Cases | |
|---|---|---|---|
| 1 | 4 or less hours | 664 |
16%
|
| 2 | 5 hours | 454 |
11%
|
| 3 | 6 hours | 1011 |
24.4%
|
| 4 | 7 hours | 914 |
22.1%
|
| 5 | 8 hours | 803 |
19.4%
|
| 6 | 9 hours | 155 |
3.7%
|
| 7 | 10 hours | 77 |
1.9%
|
| 8 | 11 or more hours | 61 |
1.5%
|
| Sysmiss | 160 |