| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 2 | 1 |
12.5%
|
|
| 5 | 1 |
12.5%
|
|
| 20 | 1 |
12.5%
|
|
| 30 | 1 |
12.5%
|
|
| 60 | 2 |
25%
|
|
| 80 | 1 |
12.5%
|
|
| 90 | 1 |
12.5%
|
|
| Sysmiss | 503 |