| Value | Category | Cases | |
|---|---|---|---|
| 1 | Full date known | 32 |
91.4%
|
| 2 | Day unknown | 0 |
0%
|
| 4 | Day and month unknown | 1 |
2.9%
|
| 8 | Unknown | 2 |
5.7%
|
| 9 | Missing | 0 | |
| Sysmiss | 906 |