| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 5 minutes | 219 |
12.3%
|
| 2 | 6-15 minutes | 232 |
13%
|
| 3 | 16-30 minutes | 108 |
6.1%
|
| 4 | 31-60 | 31 |
1.7%
|
| 5 | more than 1 hour | 56 |
3.1%
|
| 7 | don't know | 1134 |
63.7%
|
| Sysmiss | 375 |