| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
6.7%
|
| 0 | 45 |
33.6%
|
|
| 1 | 26 |
19.4%
|
|
| 2 | 18 |
13.4%
|
|
| 3 | 30 |
22.4%
|
|
| 4 | 1 |
0.7%
|
|
| 5 | 2 |
1.5%
|
|
| 7 | 1 |
0.7%
|
|
| 10 | 2 |
1.5%
|
|
| Sysmiss | 19 |