| Value | Category | Cases | |
|---|---|---|---|
| 1 | Full date known | 127 |
87.6%
|
| 2 | Day unknown | 3 |
2.1%
|
| 4 | Day and month unknown | 5 |
3.4%
|
| 8 | Unknown | 10 |
6.9%
|
| 9 | Missing | 0 | |
| Sysmiss | 796 |