| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 295 |
15.9%
|
| 2 | Between 30 minutes and 1 hour | 476 |
25.6%
|
| 3 | 1 to 3 hours | 450 |
24.2%
|
| 4 | More than 3 hours | 115 |
6.2%
|
| 99 | Do not know | 522 |
28.1%
|
| Sysmiss | 5 |