| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 35 |
33.3%
|
| -8 | does not apply | 61 |
58.1%
|
| -7 | refused to answer | 1 |
1%
|
| 1 | 6 |
5.7%
|
|
| 8 | 1 |
1%
|
|
| 16 | 1 |
1%
|
|
| Sysmiss | 651 |