| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, by boiling | 293 |
1.2%
|
| 2 | Yes, by filtering | 1981 |
7.9%
|
| 3 | Yes, by chemical treatment | 1877 |
7.5%
|
| 4 | Yes, using bottled water | 6788 |
27%
|
| 5 | No | 14206 |
56.5%
|
| Sysmiss | 1 |