| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 426 |
81.5%
|
| 2 | from calendar | 0 |
0%
|
| 5 | year | 73 |
14%
|
| 7 | month | 2 |
0.4%
|
| 8 | none | 22 |
4.2%
|
| Sysmiss | 6232 |