| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Cubic meters | 163 |
87.6%
|
| 2 | Gallons | 0 |
0%
|
| 3 | Cubic feet | 0 |
0%
|
| 4 | Other | 10 |
5.4%
|
| 5 | Liters | 13 |
7%
|
| Sysmiss | 175 |