| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 3146 |
94.4%
|
| 2 | From calendar | 8 |
0.2%
|
| 5 | Year | 176 |
5.3%
|
| 6 | 0 |
0%
|
|
| 7 | Month | 0 |
0%
|
| 8 | None | 3 |
0.1%
|
| Sysmiss | 19201 |