| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| 3 | 1 |
25%
|
|
| 5 | 1 |
25%
|
|
| 8 | 1 |
25%
|
|
| 16 | 1 |
25%
|
|
| Sysmiss | 144 |