| Value | Category |
|---|---|
| -999 | |
| -888 | |
| 1 | Sick |
| 2 | Training |
| 3 | Attending official function |
| 4 | Family emergency |
| 5 | Approved paid vacation |
| 6 | Approved unpaid vacation |
| 7 | Demands from other work outside the school |
| 8 | Only works in the afternoon shift |
| 9 | Other |
| 88 | Do not know |
| Sysmiss |