| Value | Category |
|---|---|
| 1 | Can not read at all |
| 2 | Able to read only part of (Swahili) sentence |
| 3 | Able to read whole part of (Swahili) sentence) |
| 4 | Able to read only part of (English) sentence |
| 5 | Able to read whole part of (Englishi) sentence) |
| 6 | Blind or has sight problems |
| 9 | Not stated |
| Sysmiss |