| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Mth & yr given | 163 |
42.2%
|
| 2 | 2. Yr given, DK mth | 173 |
44.8%
|
| 3 | 3. Age given, DK YM | 25 |
6.5%
|
| 8 | 8. DK yr & mth, age | 25 |
6.5%
|
| Sysmiss | 1267 |