| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 869 |
93.1%
|
| 5 | year - m imp, a calc | 26 |
2.8%
|
| 6 | 0 |
0%
|
|
| 7 | month - date placed | 0 |
0%
|
| 8 | none - date placed | 38 |
4.1%
|
| Sysmiss | 12439 |