| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 78 |
82.1%
|
| 2 | from calendar | 0 |
0%
|
| 5 | year | 13 |
13.7%
|
| 7 | month | 0 |
0%
|
| 8 | none | 4 |
4.2%
|
| Sysmiss | 710 |