| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2 |
0.3%
|
|
| 1 | Absent | 538 |
90.4%
|
| 2 | Illness | 27 |
4.5%
|
| 3 | Refusal | 10 |
1.7%
|
| 4 | Other | 18 |
3%
|
| Sysmiss | 38338 |