| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 27 |
62.8%
|
|
| 2 | 13 |
30.2%
|
|
| 3 | 3 |
7%
|
|
| Sysmiss | 318 |