| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, covered drains | 1280 |
5.2%
|
| 2 | yes, to underground drains | 4429 |
17.9%
|
| 3 | yes, to open drain | 9186 |
37%
|
| 4 | no, no system | 9914 |
40%
|