| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 1321 |
64.5%
|
| 5 | year - a, m imp | 713 |
34.8%
|
| 7 | month - a, y imp | 0 |
0%
|
| 8 | none - all imp | 13 |
0.6%
|
| Sysmiss | 13304 |