| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 55 |
82.1%
|
|
| 4 | 1 |
1.5%
|
|
| 15 | 1 |
1.5%
|
|
| 20 | 4 |
6%
|
|
| 25 | 1 |
1.5%
|
|
| 40 | 1 |
1.5%
|
|
| 50 | 3 |
4.5%
|
|
| 90 | 1 |
1.5%
|
|
| Sysmiss | 297 |