| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 31 |
30.7%
|
| 0 | None | 42 |
41.6%
|
| 1 | 11 |
10.9%
|
|
| 2 | 5 |
5%
|
|
| 5 | 4 |
4%
|
|
| 6 | 1 |
1%
|
|
| 10 | 4 |
4%
|
|
| 15 | 2 |
2%
|
|
| 25 | 1 |
1%
|
|
| Sysmiss | 56 |