| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 37 |
0.8%
|
| -7 | Not applicable (spontaneous) | 161 |
3.5%
|
| 1 | Yes | 2564 |
55.3%
|
| 2 | No | 1872 |
40.4%
|
| Sysmiss | 6038 |