| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Cubic meters | 285 |
96%
|
| 2 | Gallons | 0 |
0%
|
| 3 | Cubic feet | 1 |
0.3%
|
| 4 | Other | 0 |
0%
|
| 5 | Liters | 11 |
3.7%
|
| Sysmiss | 83 |