| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 27 |
1.4%
|
| 2 | 2. once a year | 166 |
8.5%
|
| 3 | 3. every semester | 103 |
5.3%
|
| 4 | 4. every term | 661 |
33.8%
|
| 5 | 5. every month | 483 |
24.7%
|
| 6 | 6. every week | 488 |
24.9%
|
| 8 | 10 |
0.5%
|
|
| 44 | 20 |
1%
|
|
| Sysmiss | 2580 |