| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Once a month or more | 1 |
2%
|
| 2 | 2. Several times a year | 11 |
22.4%
|
| 3 | 3. Once a year | 23 |
46.9%
|
| 4 | 4. Every few years | 11 |
22.4%
|
| 5 | 5. Never | 3 |
6.1%
|
| Sysmiss | 950 |