| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
15.8%
|
| 10 | 1 |
5.3%
|
|
| 15 | 1 |
5.3%
|
|
| 30 | 9 |
47.4%
|
|
| 40 | 2 |
10.5%
|
|
| 45 | 3 |
15.8%
|
|
| Sysmiss | 92 |