| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
2.1%
|
| -7 | Does not apply (spontaneous) | 27 |
6.3%
|
| 1 | Yes | 59 |
13.8%
|
| 2 | No | 331 |
77.7%
|
| Sysmiss | 3 |