| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 0 |
0%
|
| 3 | 1 |
2.8%
|
|
| 5 | 1 |
2.8%
|
|
| 7 | 1 |
2.8%
|
|
| 20 | 1 |
2.8%
|
|
| 25 | 6 |
16.7%
|
|
| 30 | 22 |
61.1%
|
|
| 35 | 4 |
11.1%
|
|
| Sysmiss | 483 |