| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 746 |
91.6%
|
| 2 | month and age -y imp | 0 |
0%
|
| 3 | year and age - m imp | 2 |
0.2%
|
| 4 | y & age - y ignored | 24 |
2.9%
|
| 5 | year - a, m imp | 8 |
1%
|
| 6 | age - y, m imp | 0 |
0%
|
| 7 | month - a, y imp | 1 |
0.1%
|
| 8 | none - all imp | 7 |
0.9%
|
| 9 | inconsistent | 26 |
3.2%
|
| Sysmiss | 4607 |