| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 451 |
58.3%
|
| 2 | Month and age -y imp | 2 |
0.3%
|
| 3 | Year and age - m imp | 0 |
0%
|
| 5 | Year - a, m imp | 278 |
36%
|
| 6 | Age - y, m imp | 35 |
4.5%
|
| 7 | Month - a, y imp | 1 |
0.1%
|
| 8 | None - all imp | 6 |
0.8%
|
| Sysmiss | 362 |