| Value | Category | Cases | |
|---|---|---|---|
| -1000 | Does not apply (SPONTANEOUS) | 1 |
0.2%
|
| -9 | Don’t know (SPONTANEOUS) | 5 |
1.1%
|
| 1 | yes | 310 |
69.4%
|
| 2 | No | 131 |
29.3%
|
| Sysmiss | 224 |