| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 1 |
4.3%
|
| -7 | not applicable | 4 |
17.4%
|
| 1 | yes | 2 |
8.7%
|
| 2 | no | 16 |
69.6%
|
| Sysmiss | 1972 |