| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 22671 |
97.1%
|
| 2 | Month and age -y imp | 7 |
0%
|
| 3 | Year and age - m imp | 318 |
1.4%
|
| 4 | Y & age - y ignored | 108 |
0.5%
|
| 5 | Year - a, m imp | 191 |
0.8%
|
| 6 | Age - y, m imp | 33 |
0.1%
|
| 7 | Month - a, y imp | 2 |
0%
|
| 8 | None - all imp | 21 |
0.1%
|