| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 547 |
23%
|
| 2 | Once a year | 186 |
7.8%
|
| 3 | Once a semester | 103 |
4.3%
|
| 4 | Once a term | 905 |
38%
|
| 5 | Once a month | 401 |
16.8%
|
| 6 | Once a week | 110 |
4.6%
|
| 7 | More than once a week | 44 |
1.8%
|
| 98 | Other | 84 |
3.5%
|
| Sysmiss | 947 |