| Value | Category | Cases | |
|---|---|---|---|
| -2 | Refusal to answer | 35 |
19.6%
|
| -1 | Don't know | 7 |
3.9%
|
| 0 | 135 |
75.4%
|
|
| 1 | 1 |
0.6%
|
|
| 99 | 1 |
0.6%
|
|
| Sysmiss | 1 |