| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.3%
|
| 1 | 186 |
30.4%
|
|
| 2 | No | 423 |
69.2%
|
| 5 | Yes | 0 |
0%
|
| Sysmiss | 485 |