| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
9.5%
|
| 3 | 2 |
9.5%
|
|
| 4 | 2 |
9.5%
|
|
| 8 | 8 |
38.1%
|
|
| 12 | 4 |
19%
|
|
| 15 | 1 |
4.8%
|
|
| 20 | 1 |
4.8%
|
|
| 38 | 1 |
4.8%
|
|
| Sysmiss | 130 |