| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not filled | 599 |
7.9%
|
| 1 | Yes | 3449 |
45.7%
|
| 2 | No | 3175 |
42.1%
|
| 9 | Don't know | 321 |
4.3%
|
| Sysmiss | 26987 |