| Value | Category | Cases | |
|---|---|---|---|
| -1000 | Does not apply (SPONTANEOUS) | 24 |
5.4%
|
| -9 | Don’t know (SPONTANEOUS) | 3 |
0.7%
|
| 1 | yes | 223 |
49.9%
|
| 2 | No | 197 |
44.1%
|
| Sysmiss | 224 |