| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 0 |
0%
|
| -8 | does not apply | 1 |
25%
|
| -7 | refused to answer | 0 |
0%
|
| 1 | 2 |
50%
|
|
| 3 | 1 |
25%
|
|
| Sysmiss | 752 |