| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
47.4%
|
| 1 | 5 |
26.3%
|
|
| 2 | 1 |
5.3%
|
|
| 5 | 2 |
10.5%
|
|
| 10 | 2 |
10.5%
|
|
| Sysmiss | 101 |