| Value | Category | Cases | |
|---|---|---|---|
| -1000 | Does not apply (SPONTANEOUS) | 1 |
0.2%
|
| -9 | Don’t know (SPONTANEOUS) | 2 |
0.4%
|
| 1 | yes | 304 |
67.9%
|
| 2 | No | 141 |
31.5%
|
| Sysmiss | 223 |