| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 2 |
2.5%
|
| 1 | Yes | 78 |
97.5%
|
| 2 | Refused | 0 |
0%
|
| 8 | Unknown | 0 |
0%
|
| 9 | Missing | 1 | |
| Sysmiss | 784 |