| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 170 |
91.4%
|
| 5 | year - m imp, a calc | 7 |
3.8%
|
| 7 | month - date placed | 0 |
0%
|
| 8 | none - date placed | 9 |
4.8%
|
| Sysmiss | 5235 |