| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less Than 8 Hours | 1610 |
24.4%
|
| 2 | 8-16 Hours | 573 |
8.7%
|
| 3 | 17-23 Hours | 780 |
11.8%
|
| 4 | 24 Hours | 3633 |
55%
|
| Sysmiss | 13 |