| value | category | cases | |
|---|---|---|---|
| 1 | Month and year | 6415 |
77.9%
|
| 2 | From calendar | 23 |
0.3%
|
| 5 | Year | 1793 |
21.8%
|
| 6 | 0 |
0%
|
|
| 7 | Month | 2 |
0%
|
| 8 | None | 5 |
0.1%
|
| Sysmiss | 33282 |