| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 6 |
35.3%
|
|
| 2 | 6 |
35.3%
|
|
| 3 | 1 |
5.9%
|
|
| 10 | 1 |
5.9%
|
|
| 15 | 1 |
5.9%
|
|
| 48 | 1 |
5.9%
|
|
| 145 | 1 |
5.9%
|
|
| Sysmiss | 345 |