| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 255 |
79.7%
|
| 2 | from calendar | 0 |
0%
|
| 5 | year | 49 |
15.3%
|
| 7 | month | 2 |
0.6%
|
| 8 | none | 14 |
4.4%
|
| Sysmiss | 3669 |