| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 30 minutes | 1428 |
76.9%
|
| 2 | Between 30 minutes and 1 hour | 231 |
12.4%
|
| 3 | 1 to 3 hours | 85 |
4.6%
|
| 4 | More than 3 hours | 17 |
0.9%
|
| 99 | Do not know | 97 |
5.2%
|
| Sysmiss | 5 |