| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 6 |
25%
|
| 0 | 2 |
8.3%
|
|
| 25 | 2 |
8.3%
|
|
| 30 | 1 |
4.2%
|
|
| 40 | 5 |
20.8%
|
|
| 50 | 2 |
8.3%
|
|
| 70 | 2 |
8.3%
|
|
| 90 | 1 |
4.2%
|
|
| 100 | 3 |
12.5%
|
|
| Sysmiss | 201 |