| Value | Category | Cases | |
|---|---|---|---|
| 1 | Public sys. | 96 |
35.6%
|
| 2 | Tank | 54 |
20%
|
| 3 | Deep hole | 118 |
43.7%
|
| 4 | Bucket or barrel | 2 |
0.7%
|
| 5 | Other | 0 |
0%
|
| 88 | N.A. | 41 | |
| 98 | D.K. | 0 | |
| 99 | 2 | ||
| Sysmiss | 4 |