| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a year | 218 |
57.4%
|
| 2 | Twice a year | 84 |
22.1%
|
| 3 | Three or more times a year | 15 |
3.9%
|
| 4 | Perennial crop | 63 |
16.6%
|
| Sysmiss | 10 |