| Value | Category | Cases | |
|---|---|---|---|
| 21 | 1 |
25%
|
|
| 23 | 1 |
25%
|
|
| 25 | 1 |
25%
|
|
| 35 | 1 |
25%
|
|
| 99 | 99. don't know | 0 |
0%
|
| Sysmiss | 95 |