| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 |
8.3%
|
| -7 | Does not apply (spontaneous) | 78 |
53.8%
|
| 0 | 24 |
16.6%
|
|
| 10 | 2 |
1.4%
|
|
| 15 | 1 |
0.7%
|
|
| 20 | 1 |
0.7%
|
|
| 30 | 1 |
0.7%
|
|
| 50 | 2 |
1.4%
|
|
| 80 | 2 |
1.4%
|
|
| 90 | 2 |
1.4%
|
|
| 91 | 1 |
0.7%
|
|
| 100 | 19 |
13.1%
|
|
| Sysmiss | 215 |