| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
12.5%
|
|
| 3 | 1 |
12.5%
|
|
| 7 | 1 |
12.5%
|
|
| 77 | Don't know | 5 |
62.5%
|
| Sysmiss | 1963 |