| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 731 |
23.4%
|
| 2 | 2. once a year | 172 |
5.5%
|
| 3 | 3. once a semester | 258 |
8.3%
|
| 4 | 4. once a term | 751 |
24%
|
| 5 | 5. once a month | 723 |
23.1%
|
| 6 | 6. once a week | 489 |
15.7%
|
| Sysmiss | 1414 |