| Value | Category | Cases | |
|---|---|---|---|
| 7 | 1 |
14.3%
|
|
| 10 | 1 |
14.3%
|
|
| 12 | 1 |
14.3%
|
|
| 15 | 1 |
14.3%
|
|
| 20 | 1 |
14.3%
|
|
| 25 | 1 |
14.3%
|
|
| 77 | Don't know | 1 |
14.3%
|
| Sysmiss | 2489 |