| Value | Category | Cases | |
|---|---|---|---|
| 1 | Boil and filter | 50 |
1.9%
|
| 2 | Boil only | 968 |
36.8%
|
| 3 | Filter only | 41 |
1.6%
|
| 4 | Nothing is done | 1494 |
56.8%
|
| 8 | Other (specify) | 79 |
3%
|
| Sysmiss | 8 |