| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 2451 |
87.2%
|
| 5 | year - m imp, a calc | 255 |
9.1%
|
| 7 | month - date placed | 25 |
0.9%
|
| 8 | none - date placed | 81 |
2.9%
|
| 9 | from calendar | 0 |
0%
|
| Sysmiss | 3943 |