| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2 |
14.3%
|
|
| 2 | 1 |
7.1%
|
|
| 3 | 1 |
7.1%
|
|
| 10 | 3 |
21.4%
|
|
| 16 | 1 |
7.1%
|
|
| 20 | 1 |
7.1%
|
|
| 77 | Don't know | 5 |
35.7%
|
| Sysmiss | 1957 |