| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
20%
|
| 0 | Less than one day | 4 |
16%
|
| 1 | 1 |
4%
|
|
| 2 | 2 |
8%
|
|
| 4 | 1 |
4%
|
|
| 5 | 2 |
8%
|
|
| 7 | 2 |
8%
|
|
| 14 | 1 |
4%
|
|
| 15 | 1 |
4%
|
|
| 20 | 1 |
4%
|
|
| 21 | 1 |
4%
|
|
| 30 | 3 |
12%
|
|
| 90 | 1 |
4%
|
|
| Sysmiss | 567 |