| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 94 |
92.2%
|
| 5 | year - m imp, a calc | 2 |
2%
|
| 7 | month - date placed | 0 |
0%
|
| 8 | none - date placed | 6 |
5.9%
|
| Sysmiss | 3814 |