| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.8%
|
| -7 | Does not apply (spontaneous) | 15 |
4.2%
|
| 1 | Yes | 183 |
51.1%
|
| 2 | No | 157 |
43.9%
|
| Sysmiss | 1 |