| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 20076 |
90.9%
|
| 2 | Month and age -y imp | 0 |
0%
|
| 3 | Year and age - m imp | 844 |
3.8%
|
| 4 | Y & age - y ignored | 640 |
2.9%
|
| 5 | Year - a, m imp | 461 |
2.1%
|
| 6 | Age - y, m imp | 20 |
0.1%
|
| 7 | Month - a, y imp | 2 |
0%
|
| 8 | None - all imp | 31 |
0.1%
|