| Value | Category |
|---|---|
| 1 | Less than one agricultural season |
| 2 | At least one agricultural season but less than one agricultu |
| 3 | At least one agricultural year but less than two agricultura |
| 4 | At least two agricultural years but less than five agricultu |
| 5 | At least five agricultural years but less than twelve agricu |
| 6 | Twelve agricultural years or more |