| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, by boiling | 3341 |
13.3%
|
| 2 | Yes, by filtering | 773 |
3.1%
|
| 3 | Yes, by chemical treatment | 864 |
3.4%
|
| 4 | Yes, using bottled water | 3051 |
12.1%
|
| 5 | No | 17115 |
68.1%
|
| Sysmiss | 2 |