| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
1.1%
|
| -7 | Does not apply (spontaneous) | 35 |
2.6%
|
| 1 | Yes | 200 |
15%
|
| 2 | No | 1085 |
81.3%
|
| Sysmiss | 2 |