| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.2%
|
| -7 | Does not apply (spontaneous) | 4 |
0.7%
|
| 1 | Yes | 354 |
61.9%
|
| 2 | No | 213 |
37.2%
|
| Sysmiss | 628 |