| Value | Category | 
|---|---|
| 1 | Producing primarily for sale (selling 90% or more) | 
| 2 | Producing mainly for sale, with some own consumption (selling more than 50% and up to 90%) | 
| 3 | Producing mainly for own consumption, with some sales (selling more than 10% and up to 50%) | 
| 4 | Producing primarily for own consumption (selling 10% or less) |