| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15-30 minutes | 90 |
52.6%
|
| 2 | 30-45 minutes | 27 |
15.8%
|
| 3 | 45-60 minutes | 9 |
5.3%
|
| 4 | Don't know | 1 |
0.6%
|
| 5 | Less than 15 minutes | 41 |
24%
|
| 6 | more than one hour. | 3 |
1.8%
|
| Sysmiss | 3 |