| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 12 |
50%
|
|
| 2 | 6 |
25%
|
|
| 3 | 3 |
12.5%
|
|
| 4 | 2 |
8.3%
|
|
| 9 | 1 |
4.2%
|
|
| Sysmiss | 132 |