| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 4 | 1 |
14.3%
|
|
| 7 | 1 |
14.3%
|
|
| 14 | 5 |
71.4%
|
|
| Sysmiss | 143 |