| Value | Category |
|---|---|
| -777 | |
| 1 | Teaching in another public school |
| 2 | Teaching in another private school |
| 3 | Providing private tuitions |
| 4 | Agriculture and livestock |
| 5 | Business |
| 6 | Politics and/or trade union work |
| 7 | Social work |
| 8 | Other income earning activities |
| 77 | Not applicable |