| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
70.8%
|
| 0 | Less than one day | 0 |
0%
|
| 2 | 2 |
8.3%
|
|
| 5 | 1 |
4.2%
|
|
| 30 | 1 |
4.2%
|
|
| 60 | 1 |
4.2%
|
|
| 90 | 1 |
4.2%
|
|
| 100 | 1 |
4.2%
|
|
| Sysmiss | 995 |