| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 2 |
5.4%
|
| 1 | 33 |
89.2%
|
|
| 3 | 1 |
2.7%
|
|
| 9 | 1 |
2.7%
|
|
| Sysmiss | 111 |