| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 52 |
22.8%
|
| -7 | Does not apply (spontaneous) | 112 |
49.1%
|
| 0 | 18 |
7.9%
|
|
| 20 | 2 |
0.9%
|
|
| 30 | 1 |
0.4%
|
|
| 50 | 2 |
0.9%
|
|
| 80 | 1 |
0.4%
|
|
| 95 | 2 |
0.9%
|
|
| 100 | 38 |
16.7%
|
|
| Sysmiss | 134 |