| Value | Category | Cases | |
|---|---|---|---|
| 1 | Full date known | 238 |
26.9%
|
| 2 | Day unknown | 67 |
7.6%
|
| 4 | Day and month unknown | 413 |
46.7%
|
| 8 | Unknown | 167 |
18.9%
|
| 9 | Missing | 0 | |
| Sysmiss | 56 |