| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 1401 |
53%
|
| 2 | month and age -y imp | 10 |
0.4%
|
| 3 | year and age - m imp | 241 |
9.1%
|
| 5 | year - a, m imp | 14 |
0.5%
|
| 6 | age - y, m imp | 23 |
0.9%
|
| 7 | month - a, y imp | 7 |
0.3%
|
| 8 | none - all imp | 106 |
4%
|
| 9 | all present but inc | 842 |
31.8%
|
| Sysmiss | 1272 |