| Value | Category | Cases | |
|---|---|---|---|
| -1000 | Does not apply (SPONTANEOUS) | 33 |
7.4%
|
| -9 | Don’t know (SPONTANEOUS) | 3 |
0.7%
|
| 1 | yes | 254 |
56.8%
|
| 2 | No | 157 |
35.1%
|
| Sysmiss | 224 |