| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 5 |
3.7%
|
| -8 | refusal | 7 |
5.2%
|
| 1 | yes | 3 |
2.2%
|
| 2 | no | 120 |
88.9%
|
| Sysmiss | 820 |