| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month | 2 |
50%
|
| 2 | Year | 0 |
0%
|
| 3 | Both month and Year | 0 |
0%
|
| 4 | Unknown to respondent | 2 |
50%
|
| Sysmiss | 2310 |