| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.7%
|
| -7 | Does not apply (spontaneous) | 12 |
2.8%
|
| 1 | Yes | 271 |
63.6%
|
| 2 | No | 140 |
32.9%
|
| Sysmiss | 3 |