| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 183 |
17.7%
|
| -7 | Does not apply (spontaneous) | 13 |
1.3%
|
| 1 | Yes | 465 |
45.1%
|
| 2 | No | 371 |
35.9%
|
| Sysmiss | 608 |