| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
5.7%
|
| 1 | 3 |
4.3%
|
|
| 5 | 2 |
2.9%
|
|
| 8 | 1 |
1.4%
|
|
| 10 | 9 |
12.9%
|
|
| 12 | 5 |
7.1%
|
|
| 15 | 15 |
21.4%
|
|
| 20 | 8 |
11.4%
|
|
| 25 | 2 |
2.9%
|
|
| 30 | 14 |
20%
|
|
| 35 | 1 |
1.4%
|
|
| 40 | 1 |
1.4%
|
|
| 42 | 1 |
1.4%
|
|
| 45 | 2 |
2.9%
|
|
| 50 | 1 |
1.4%
|
|
| 59 | 1 |
1.4%
|
|
| Sysmiss | 308 |