| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 1864 |
91.1%
|
| 2 | From calendar | 0 |
0%
|
| 5 | Year | 181 |
8.9%
|
| 6 | 0 |
0%
|
|
| 7 | Month | 0 |
0%
|
| 8 | None | 0 |
0%
|
| Sysmiss | 20489 |