| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 224 |
7.6%
|
| 2 | Once a year | 54 |
1.8%
|
| 3 | Once a Semester | 158 |
5.3%
|
| 4 | Once a term | 709 |
23.9%
|
| 5 | Once a month | 946 |
31.9%
|
| 6 | Once a week | 872 |
29.4%
|
| Sysmiss | 364 |