| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2.8%
|
| 1 | 6 |
16.7%
|
|
| 2 | 6 |
16.7%
|
|
| 3 | 2 |
5.6%
|
|
| 5 | 1 |
2.8%
|
|
| 7 | 1 |
2.8%
|
|
| 8 | 1 |
2.8%
|
|
| 10 | 5 |
13.9%
|
|
| 15 | 1 |
2.8%
|
|
| 19 | 1 |
2.8%
|
|
| 20 | 5 |
13.9%
|
|
| 21 | 1 |
2.8%
|
|
| 25 | 1 |
2.8%
|
|
| 30 | 1 |
2.8%
|
|
| 34 | 1 |
2.8%
|
|
| 36 | 1 |
2.8%
|
|
| 40 | 1 |
2.8%
|
|
| Sysmiss | 214 |