| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 206 |
7.5%
|
| 2 | Once a year | 110 |
4%
|
| 3 | Once a Semester | 379 |
13.9%
|
| 4 | Once a term | 1335 |
48.8%
|
| 5 | Once a month | 493 |
18%
|
| 6 | Once a week | 211 |
7.7%
|
| Sysmiss | 593 |