| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 7 | 1 |
12.5%
|
|
| 15 | 1 |
12.5%
|
|
| 30 | 3 |
37.5%
|
|
| 45 | 1 |
12.5%
|
|
| 60 | 1 |
12.5%
|
|
| 75 | 1 |
12.5%
|
|
| Sysmiss | 303 |