| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a year | 241 |
65.7%
|
| 2 | Twice a year | 69 |
18.8%
|
| 3 | Three or more times a year | 6 |
1.6%
|
| 4 | Perennial crop | 51 |
13.9%
|
| Sysmiss | 23 |