| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
15%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 0 | Less than one day | 1 |
5%
|
| 7 | 1 |
5%
|
|
| 8 | 2 |
10%
|
|
| 14 | 6 |
30%
|
|
| 20 | 1 |
5%
|
|
| 21 | 2 |
10%
|
|
| 30 | 1 |
5%
|
|
| 44 | 1 |
5%
|
|
| 60 | 1 |
5%
|
|
| 240 | 1 |
5%
|
|
| Sysmiss | 94 |