| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
15%
|
| 1 | 14 |
35%
|
|
| 2 | 6 |
15%
|
|
| 3 | 5 |
12.5%
|
|
| 4 | 3 |
7.5%
|
|
| 5 | 1 |
2.5%
|
|
| 6 | 1 |
2.5%
|
|
| 10 | 1 |
2.5%
|
|
| 20 | 1 |
2.5%
|
|
| 25 | 1 |
2.5%
|
|
| 30 | 1 |
2.5%
|
|
| Sysmiss | 1406 |