| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
10%
|
| 1 | 18 |
30%
|
|
| 2 | 11 |
18.3%
|
|
| 3 | 14 |
23.3%
|
|
| 4 | 5 |
8.3%
|
|
| 5 | 3 |
5%
|
|
| 12 | 2 |
3.3%
|
|
| 20 | 1 |
1.7%
|
|
| Sysmiss | 85 |