| Value | Category | Cases | |
|---|---|---|---|
| -9 | -9. don't know | 17 |
63%
|
| -8 | -8. refused | 3 |
11.1%
|
| 0 | 6 |
22.2%
|
|
| 1200 | 1 |
3.7%
|
|
| Sysmiss | 72 |