| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
4.2%
|
| 2 | 2 |
2.8%
|
|
| 5 | 1 |
1.4%
|
|
| 7 | 2 |
2.8%
|
|
| 8 | 1 |
1.4%
|
|
| 10 | 8 |
11.3%
|
|
| 11 | 1 |
1.4%
|
|
| 12 | 12 |
16.9%
|
|
| 13 | 2 |
2.8%
|
|
| 14 | 3 |
4.2%
|
|
| 15 | 8 |
11.3%
|
|
| 16 | 3 |
4.2%
|
|
| 17 | 2 |
2.8%
|
|
| 20 | 5 |
7%
|
|
| 25 | 8 |
11.3%
|
|
| 30 | 3 |
4.2%
|
|
| 35 | 7 |
9.9%
|
|
| Sysmiss | 927 |