| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
1.2%
|
| -7 | Does not apply (spontaneous) | 21 |
1.6%
|
| 1 | Yes | 425 |
31.8%
|
| 2 | No | 873 |
65.4%
|
| Sysmiss | 2 |