| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 5 | 7 |
25.9%
|
|
| 8 | 1 |
3.7%
|
|
| 10 | 9 |
33.3%
|
|
| 11 | 1 |
3.7%
|
|
| 15 | 3 |
11.1%
|
|
| 20 | 2 |
7.4%
|
|
| 30 | 2 |
7.4%
|
|
| 40 | 1 |
3.7%
|
|
| 50 | 1 |
3.7%
|
|
| Sysmiss | 335 |