| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
25%
|
|
| 7 | 1 |
25%
|
|
| 10 | 1 |
25%
|
|
| 12 | 1 |
25%
|
|
| 99 | 99. don't know | 0 |
0%
|
| Sysmiss | 95 |