| Value | Category | Cases | |
|---|---|---|---|
| 1 | bucket | 90 |
76.3%
|
| 2 | polytank | 13 |
11%
|
| 3 | direct from source | 2 |
1.7%
|
| 4 | other (specify) | 13 |
11%
|
| Sysmiss | 303 |