| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
20%
|
|
| 3 | 1 |
20%
|
|
| 4 | 1 |
20%
|
|
| 11 | 1 |
20%
|
|
| 99 | 99. Don't know | 1 |
20%
|
| Sysmiss | 94 |