| Value | Category | Cases | |
|---|---|---|---|
| 1 | Biosand Filter | 0 |
0%
|
| 2 | Ceramic Pot Filter | 0 |
0%
|
| 3 | Candle Filter/Bucket Filter | 1 |
0.1%
|
| 4 | Other | 980 |
99.9%
|