| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 50 |
35.7%
|
| 0 | None | 64 |
45.7%
|
| 1 | 11 |
7.9%
|
|
| 2 | 5 |
3.6%
|
|
| 3 | 1 |
0.7%
|
|
| 5 | 6 |
4.3%
|
|
| 10 | 2 |
1.4%
|
|
| 30 | 1 |
0.7%
|
|
| Sysmiss | 362 |