| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 8291 |
97.4%
|
| 2 | From calendar | 1 |
0%
|
| 5 | Year | 222 |
2.6%
|
| 7 | Month | 0 |
0%
|
| 8 | None | 0 |
0%
|
| Sysmiss | 28655 |