| Value | Category | Cases | |
|---|---|---|---|
| 1 | up to 1 hour | 203 |
72.5%
|
| 2 | more than 1 to 2 hours | 49 |
17.5%
|
| 3 | more than 2 hours | 6 |
2.1%
|
| 4 | uninformed | 22 |
7.9%
|
| Sysmiss | 210 |