| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1072 |
19.8%
|
| 1 | yes, spontaneously | 2878 |
53.1%
|
| 2 | yes, probed | 1469 |
27.1%
|
| 8 | not asked | 0 |
0%
|
| Sysmiss | 2 |