| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month | 490 |
3.3%
|
| 2 | Season | 8697 |
58.3%
|
| 3 | Year | 5733 |
38.4%
|
| 4 | Other (specify) | 9 |
0.1%
|
| Sysmiss | 1529 |