| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 30 |
96.8%
|
| 2 | from calendar | 0 |
0%
|
| 5 | year | 1 |
3.2%
|
| 7 | month | 0 |
0%
|
| 8 | none | 0 |
0%
|
| Sysmiss | 181 |