| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 22 |
22.4%
|
| 1 | 3 |
3.1%
|
|
| 3 | 5 |
5.1%
|
|
| 5 | 5 |
5.1%
|
|
| 6 | 1 |
1%
|
|
| 7 | 10 |
10.2%
|
|
| 14 | 11 |
11.2%
|
|
| 15 | 4 |
4.1%
|
|
| 20 | 2 |
2%
|
|
| 22 | 1 |
1%
|
|
| 25 | 1 |
1%
|
|
| 30 | 21 |
21.4%
|
|
| 60 | 9 |
9.2%
|
|
| 90 | 3 |
3.1%
|
|
| Sysmiss | 904 |