| Value | Category | Cases | |
|---|---|---|---|
| -2 | don't know | 1 |
0.4%
|
| -1 | refuse | 0 |
0%
|
| 1 | 0-8 hour | 1 |
0.4%
|
| 2 | 9-16 hours | 2 |
0.8%
|
| 3 | 17-24 hours | 258 |
98.5%
|
| Sysmiss | 787 |