| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. ONCE A YEAR | 40 |
47.6%
|
| 2 | 2. ONCE IN EVERY TWO YEARS | 40 |
47.6%
|
| 3 | 3. OTHERS | 4 |
4.8%
|
| Sysmiss | .don't know | 0 | |
| Sysmiss | .qre refused | 0 | |
| Sysmiss | .refusal | 0 | |
| Sysmiss | .skip | 0 | |
| Sysmiss | 69 |