| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
4.2%
|
| 0 | 28 |
29.2%
|
|
| 1 | 16 |
16.7%
|
|
| 2 | 20 |
20.8%
|
|
| 3 | 5 |
5.2%
|
|
| 4 | 2 |
2.1%
|
|
| 5 | 4 |
4.2%
|
|
| 6 | 1 |
1%
|
|
| 7 | 3 |
3.1%
|
|
| 8 | 1 |
1%
|
|
| 9 | 1 |
1%
|
|
| 10 | 3 |
3.1%
|
|
| 12 | 1 |
1%
|
|
| 16 | 1 |
1%
|
|
| 20 | 2 |
2.1%
|
|
| 25 | 1 |
1%
|
|
| 30 | 3 |
3.1%
|
|
| Sysmiss | 249 |