| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 996 |
90.1%
|
| 2 | month and age -y imp | 0 |
0%
|
| 3 | year and age - m imp | 2 |
0.2%
|
| 4 | y & age - y ignored | 27 |
2.4%
|
| 5 | year - a, m imp | 18 |
1.6%
|
| 6 | age - y, m imp | 0 |
0%
|
| 7 | month - a, y imp | 0 |
0%
|
| 8 | none - all imp | 9 |
0.8%
|
| 9 | inconsistent | 54 |
4.9%
|
| Sysmiss | 4315 |