| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 1558 |
88.4%
|
| 2 | From calendar | 0 |
0%
|
| 5 | Year | 180 |
10.2%
|
| 6 | Not coded | 0 |
0%
|
| 7 | Month | 14 |
0.8%
|
| 8 | None | 11 |
0.6%
|
| Sysmiss | 32833 |