| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.2%
|
| -7 | Does not apply (spontaneous) | 9 |
2.2%
|
| 1 | Yes | 272 |
67.8%
|
| 2 | No | 119 |
29.7%
|
| Sysmiss | 8 |