| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 4 |
20%
|
|
| 1 | 5 |
25%
|
|
| 2 | 4 |
20%
|
|
| 3 | 3 |
15%
|
|
| 4 | 1 |
5%
|
|
| 9 | 1 |
5%
|
|
| 48 | 1 |
5%
|
|
| 72 | 1 |
5%
|
|
| Sysmiss | 341 |