| Value | Category | Cases | |
|---|---|---|---|
| 1 | Public network | 4775 |
57.9%
|
| 2 | Porous Cesspit | 2411 |
29.2%
|
| 3 | Tight Cesspit | 1009 |
12.2%
|
| 4 | None | 44 |
0.5%
|
| Sysmiss | 5 |