| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 5 |
62.5%
|
|
| 3 | 1 |
12.5%
|
|
| 4 | 1 |
12.5%
|
|
| 8 | 1 |
12.5%
|
|
| Sysmiss | 234 |