| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 621 |
22.7%
|
| 2 | Once a year | 108 |
4%
|
| 3 | Once a Semester | 246 |
9%
|
| 4 | Once a term | 689 |
25.2%
|
| 5 | Once a month | 442 |
16.2%
|
| 6 | Once a week | 256 |
9.4%
|
| 7 | 372 |
13.6%
|
|
| Sysmiss | 593 |