| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 38 |
2.7%
|
| -7 | Does not apply (spontaneous) | 61 |
4.3%
|
| 1 | Yes | 213 |
15.1%
|
| 2 | No | 1101 |
77.9%
|
| Sysmiss | 33 |