| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 4086 |
98.4%
|
| 2 | month and age -y imp | 0 |
0%
|
| 3 | year and age - m imp | 39 |
0.9%
|
| 4 | y & age - y ignored | 0 |
0%
|
| 5 | year - a, m imp | 19 |
0.5%
|
| 6 | age - y, m imp | 1 |
0%
|
| 7 | month - a, y imp | 2 |
0%
|
| 8 | none - all imp | 4 |
0.1%
|
| 11 | .Z | 14603 |