| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a year | 319 |
82.4%
|
| 2 | Twice a year | 35 |
9%
|
| 3 | Three or more times a year | 3 |
0.8%
|
| 4 | Perennial crop | 30 |
7.8%
|
| Sysmiss | 3 |