| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
8%
|
| 2 | 10 |
40%
|
|
| 3 | 8 |
32%
|
|
| 4 | 2 |
8%
|
|
| 7 | 1 |
4%
|
|
| 47 | 1 |
4%
|
|
| 70 | 1 |
4%
|
|
| Sysmiss | 335 |