| Value | Category | Cases | |
|---|---|---|---|
| -2 | Don't know | 49 |
1.6%
|
| -1 | Refused | 4 |
0.1%
|
| 1 | Vernacular language | 4 |
0.1%
|
| 2 | Swahili | 2936 |
97.9%
|
| 3 | Foreign language | 6 |
0.2%
|