| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 2 | 1 |
5%
|
|
| 4 | 3 |
15%
|
|
| 5 | 5 |
25%
|
|
| 6 | 1 |
5%
|
|
| 7 | 1 |
5%
|
|
| 11 | 1 |
5%
|
|
| 12 | 2 |
10%
|
|
| 13 | 1 |
5%
|
|
| 17 | 1 |
5%
|
|
| 23 | 1 |
5%
|
|
| 30 | 1 |
5%
|
|
| 49 | 1 |
5%
|
|
| 164 | 1 |
5%
|
|
| Sysmiss | 83 |