| Value |
Category |
| -9 |
Don't know (spontaneous) |
| 1 |
Cubic meters |
| 2 |
Gallons |
| 3 |
Cubic feet |
| 4 |
Other |
| 5 |
Liters |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
