| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
0.4%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 1 | Yes | 639 |
48.6%
|
| 2 | No | 671 |
51%
|
| Sysmiss | 1220 |