| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
4.8%
|
| 0 | Less than one day | 3 |
14.3%
|
| 1 | 5 |
23.8%
|
|
| 2 | 4 |
19%
|
|
| 3 | 3 |
14.3%
|
|
| 5 | 1 |
4.8%
|
|
| 7 | 3 |
14.3%
|
|
| 30 | 1 |
4.8%
|
|
| Sysmiss | 689 |