| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 318 |
11.6%
|
| 2 | Once a year | 140 |
5.1%
|
| 3 | Once a Semester | 115 |
4.2%
|
| 4 | Once a term | 830 |
30.4%
|
| 5 | Once a month | 594 |
21.7%
|
| 6 | Once a week | 737 |
27%
|
| Sysmiss | 593 |