| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 20 |
39.2%
|
| 0 | 20 |
39.2%
|
|
| 10 | 2 |
3.9%
|
|
| 20 | 1 |
2%
|
|
| 25 | 3 |
5.9%
|
|
| 40 | 3 |
5.9%
|
|
| 50 | 2 |
3.9%
|
|
| Sysmiss | 99 |