| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 2 | 16 |
40%
|
|
| 3 | 13 |
32.5%
|
|
| 4 | 5 |
12.5%
|
|
| 5 | 3 |
7.5%
|
|
| 12 | 1 |
2.5%
|
|
| 16 | 1 |
2.5%
|
|
| 20 | 1 |
2.5%
|
|
| Sysmiss | 340 |