| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 3538 |
65.6%
|
| 1 | yes, spontaneously | 749 |
13.9%
|
| 2 | yes, probed | 1105 |
20.5%
|
| 8 | not asked | 0 |
0%
|
| Sysmiss | 29 |