| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1912 |
62.3%
|
|
| 1 | yes | 297 |
9.7%
|
| 2 | no | 0 |
0%
|
| 9 | don't know | 858 |
28%
|
| 77 | refuse | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| Sysmiss | 1903 |