| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, underground drains | 28 |
0.5%
|
| 2 | Yes, open drains | 79 |
1.3%
|
| 3 | Yes, soak pits | 805 |
13.3%
|
| 4 | Yes, other | 1135 |
18.8%
|
| 5 | No | 4004 |
66.2%
|